INDIANAPOLIS | CGN News’ Weekly Weather Brief for 5–12 July 2026 tracks a shift from the holiday heat wave into a wetter eastern pattern, a new dangerous-heat signal in the Southwest and Great Basin, repeated thunderstorm chances from the Midwest into the Mid-Atlantic, and active monsoon rainfall in parts of Asia.
This is a planning forecast, not a live emergency alert page. Readers should check official watches, warnings, flood statements, air-quality guidance, transport notices and local emergency instructions before travel, outdoor work, public events or long periods outside.
National planning headline
The main U.S. pattern is changing. The strongest heat that dominated parts of the East during the holiday period is easing in several cities, but humid air and rounds of showers and thunderstorms remain from the Great Lakes and Ohio Valley into the Mid-Atlantic and Northeast. Heavy downpours, lightning, localized damaging wind gusts and flash-flood potential are the practical concerns where storms repeat over urban corridors.
Farther west, heat becomes the larger planning story. Phoenix enters the week with an official Extreme Heat Warning for Tuesday through Thursday, and Las Vegas, Salt Lake City, Dallas and Denver all need heat-management plans for outdoor work, events, children, pets and older adults. Internationally, London is unusually warm, Hong Kong remains wet and under official heat and tropical-cyclone-related guidance at publication time, Manila turns wetter late week, and Mumbai remains in a monsoon pattern with heavy rain concerns.
50-city forecast
Indianapolis: Humid, unsettled weather starts the week, with highs mostly in the low to upper 80s before a brief push near 90°F Wednesday. Showers and thunderstorms are possible Sunday, Monday, Thursday, Friday and Saturday. Planning: Heat is less extreme than last week, but lightning and downpours matter for outdoor plans.
Valparaiso: Northwest Indiana stays cooler near Lake Michigan, with highs from the upper 70s to mid-80s and the warmest stretch Tuesday and Wednesday. Late-week rain and thunderstorms are possible Thursday and Friday. Planning: Beach, commuter and youth-sports plans should keep a storm backup late week.
Chicago: Chicago turns more comfortable early, with highs in the 70s Monday and Tuesday before warming into the upper 80s Wednesday. Thunderstorm chances return Thursday and Friday before a pleasant Saturday. Planning: The main concern is late-week storm timing on expressways, lakefront events and flights.
Des Moines: Central Iowa remains humid and warm, with highs mainly in the mid- to upper 80s and near 90°F Wednesday and Saturday. Thunderstorms are most likely late Wednesday into Thursday. Planning: Keep cooling and rain plans flexible for outdoor work and evening events.
St. Louis: St. Louis stays humid and storm-prone early, with highs mostly in the upper 80s to mid-90s before a cooler Saturday. Thunderstorm chances appear most days through Friday. Planning: Heat and afternoon storms both matter, especially for riverfront, bridge and outdoor-event plans.
Kansas City: Kansas City runs warm to hot, with highs in the upper 80s and low to mid-90s, peaking around Wednesday. A spotty thunderstorm risk returns Thursday and Friday. Planning: Heat precautions are important midweek, with a storm backup for late-week outdoor activity.
Springfield: Southwest Missouri stays humid, with highs in the mid-80s to low 90s and scattered thunderstorm chances Sunday, Tuesday, Friday and Saturday. Planning: The pattern favors scattered storms rather than a full washout, but lightning can interrupt outdoor recreation quickly.
Tecumseh: The Ozarks stay humid and unsettled, with highs in the mid-80s to mid-90s and several afternoon thunderstorm chances. Thursday is the hottest and most storm-sensitive day. Planning: Lake, river and camping plans should account for heat early and storms later in the day.
Wichita: Wichita trends hot by midweek, with highs near 90°F early and around 100°F Wednesday before easing late week. Rain chances are limited, with only a brief shower risk Friday. Planning: Heat becomes the primary hazard, especially Wednesday.
Detroit: Detroit begins with heavy showers and thunderstorms Sunday, then warms into the mid- to upper 80s. More rain and thunder are possible Thursday and Friday before a brighter Saturday. Planning: Watch for ponding and slow travel during the wetter periods.
Grand Rapids: West Michigan turns hot Tuesday and Wednesday, with highs near 90–92°F, then cools slightly with storms Thursday and Friday. Planning: Midweek heat and late-week storms are the two main issues.
Cleveland: Cleveland stays humid with highs mostly in the upper 70s to upper 80s. Showers and thunderstorms are possible Sunday, Monday, Thursday, Friday and Saturday. Planning: Lakefront plans should remain flexible because showers can develop even when temperatures are not extreme.
Columbus: Central Ohio remains humid with several rain and thunderstorm chances and highs mostly in the low to upper 80s. Sunday and Monday storms may include flooding downpours or gusty winds. Planning: The main risk is repeated rain and lightning rather than extreme heat.
Cincinnati: Cincinnati stays warm and humid, with highs in the low to upper 80s and frequent thunderstorm chances through Saturday. Planning: Outdoor plans need rain timing and lightning safety built in almost every day.
Milwaukee: Milwaukee has a cooler lake-influenced start, then warms into the lower to mid-80s Wednesday. Thunderstorms are possible Thursday before pleasant conditions return. Planning: This is a manageable week, but Thursday is the day to watch.
Madison: Madison stays warm, with highs generally in the upper 70s to mid-80s and a late-Wednesday to Thursday thunderstorm signal. Planning: Heat is moderate; storm timing is the main disruption risk.
Minneapolis–St. Paul: The Twin Cities stay humid and warm, with highs in the low to upper 80s and multiple shower or thunderstorm chances from Monday through Friday. Planning: Events should stay flexible for pop-up storms and changing air quality.
Omaha: Omaha remains humid, with highs mostly in the upper 80s to low 90s and afternoon thunderstorm chances Wednesday and Thursday. Haze and air-quality concerns may continue at times. Planning: Heat, haze and storms all deserve attention for outdoor work.
Fargo: Fargo starts hot, near 90°F Sunday and Monday, with a stronger thunderstorm risk Monday that may include heavy rain, hail or damaging wind. Temperatures ease into the 80s after that. Planning: Monday is the main severe-weather watch day.
Sioux Falls: Sioux Falls stays warm to hot, with highs near 86–91°F and thunderstorm chances Wednesday and Thursday. Planning: Heat is steady but not extreme; late-day storms could affect travel and outdoor events.
Louisville: Louisville remains very humid with highs mostly in the 80s to low 90s and frequent rain or thunderstorm chances. Planning: Heavy downpours and lightning are the main concerns for the week.
Lexington: Lexington stays humid and unsettled, with highs mostly in the low to upper 80s and thunderstorms possible on several days. Planning: The wettest risks are early in the week and again Friday into Saturday.
Nashville: Nashville remains hot and humid, with highs in the upper 80s to mid-90s and scattered storm chances returning through the week. Planning: Heat precautions are needed, especially for outdoor work and evening events after hot afternoons.
Memphis: Memphis stays hot, with highs in the low to mid-90s and humid nights. Storm coverage looks scattered, with a better chance late week. Planning: Heat stress is the primary concern even when storms are isolated.
New York: New York turns cooler than the recent heat wave but stays humid, with rain and thunderstorms possible early week and again Friday or Saturday. Planning: Watch subway, airport, park and street-flooding updates if heavy rain repeats.
Boston: Boston gets relief from the heat but faces periods of rain Monday and Tuesday, including heavy downpours that may reduce visibility and cause ponding. Planning: The first half of the week is the main travel and drainage concern.
Philadelphia: Philadelphia starts hot and humid Sunday, then turns cooler but stormy Monday and Tuesday before another warm-up late week. Thunderstorms may include downpours and gusty winds. Planning: Flood-prone urban routes need extra attention early week.
Pittsburgh: Pittsburgh remains humid, with highs in the low to upper 80s and repeated shower or thunderstorm chances. Planning: Flash-flood-sensitive roads and low spots should be monitored where storms train over the same area.
Washington: Washington begins hot Sunday, then turns less hot but humid with repeated shower and thunderstorm chances. Friday may heat back into the mid-90s before another unsettled Saturday. Planning: Heavy downpours may affect monuments, queues, transit and airport travel.
Norfolk: Norfolk starts very hot, near the upper 90s Sunday, then cools into the 80s and low 90s with storms Monday through Thursday. Planning: Heat and coastal humidity are the first concerns, then heavy afternoon storms.
Raleigh: Raleigh remains one of the hotter eastern cities, with highs mostly in the low to upper 90s and several afternoon thunderstorm chances. Planning: Outdoor work, youth sports and errands should avoid peak heat when possible.
Myrtle Beach: Myrtle Beach stays humid and breezy, with highs near 90°F early and rising into the mid- to upper 90s late week. Thunderstorms are possible several days. Planning: Beach plans need hydration, sun protection and quick shelter for lightning.
Miami: Miami keeps a tropical-season pattern, with highs near 88–92°F, humid nights and scattered showers or thunderstorms on several days. Planning: Lightning safety matters even when storms are brief.
Tampa: Tampa stays hot and humid, with highs near 90–97°F and daily or near-daily shower and thunderstorm chances. Planning: Friday may be especially hot, and afternoon storms may affect bridges, beaches and commute corridors.
Orlando: Orlando remains hot, with highs in the low to upper 90s and frequent afternoon storm chances. Planning: Theme-park and outdoor-event plans should expect lightning delays and brief heavy rain.
Baton Rouge: Baton Rouge stays humid, with highs near 88–91°F and daily storm chances, including a drenching thunderstorm risk Monday. Planning: Heat, lightning and quick poor-drainage flooding are the main issues.
Atlanta: Atlanta remains warm to hot and unsettled, with highs near 89–93°F and daily afternoon storm chances. Planning: Outdoor-event plans should stay flexible, especially Thursday and Friday.
Dallas: Dallas stays very hot, with highs near 98–101°F through Friday before easing slightly Saturday. A strong thunderstorm is possible Sunday, then heat dominates. Planning: Heat safety is the main issue all week.
Denver: Denver starts hot, with highs in the upper 90s Sunday and Monday, then cools into the upper 80s with several afternoon thunderstorm chances before heating again Saturday. Planning: Air quality, heat and lightning all matter for outdoor plans.
Salt Lake City: Salt Lake City remains hot, with highs mostly in the upper 90s to low 100s and a stronger heat signal Friday and Saturday. Planning: Limit prolonged afternoon exposure and keep water and cooling access ready.
Las Vegas: Las Vegas moves into dangerous desert heat, with highs near 106–114°F through the week. Planning: Outdoor activity should be minimized during the afternoon, and travelers should prepare for very hot parked vehicles and long walks.
Phoenix: Phoenix stays extremely hot, with highs around 110–113°F and an official Extreme Heat Warning for Tuesday through Thursday. Planning: Cooling centers, early-morning scheduling, hydration and checks on vulnerable people are essential.
Los Angeles: Los Angeles stays mild and mostly dry, with highs generally in the lower to mid-80s and morning low clouds at times. Planning: This is one of the steadier forecasts in the U.S. list.
Seattle: Seattle has a favorable early-July pattern, with highs in the low to upper 70s and intervals of clouds and sun. Planning: Outdoor plans look workable, especially Monday and later in the week.
London: London stays very warm to hot for the U.K., with highs generally 28–32°C through Saturday. Planning: Heat precautions matter for homes, transit and outdoor queues without widespread air conditioning.
Sydney: Sydney stays in a cool winter pattern, with highs near 16–19°C, breezy conditions and showers at times before brighter conditions late in the period. Planning: Keep rain gear ready early; the weekend trends more favorable.
Hong Kong: Hong Kong remains cloudy, breezy and wet early, with highs near 24–31°C and official heat and tropical-cyclone-related guidance active at publication time. Planning: Residents should follow Hong Kong Observatory updates for heat, rain, wind and marine conditions.
Rio de Janeiro: Rio stays pleasant for winter, with highs generally 22–25°C and a mostly dry trend after a cloudy Sunday. Planning: This is a relatively stable international forecast.
Manila: Manila stays humid and hot early, with highs near 33–35°C, then turns wetter and breezier late week with rain and thunderstorms. Planning: Commuting and outdoor plans may face heavier disruption Friday and Saturday.
Mumbai: Mumbai remains in an active monsoon pattern, with highs near 28–32°C, rain at times and an official IMD orange alert for heavy rainfall and gusty winds at publication time. Planning: Road, rail, drainage and coastal travel updates should be checked frequently.
Forecast confidence decreases later in the week. A dry morning can still become stormy by afternoon in summer patterns, and heat risk can rise quickly where humidity, poor overnight cooling or limited air conditioning are present.
Additional Reporting By: National Weather Service; NOAA; NOAA Weather Prediction Center; Open-Meteo; AccuWeather; Met Office; Australian Bureau of Meteorology; Hong Kong Observatory; Instituto Nacional de Meteorologia; India Meteorological Department; PAGASA; Jessica Storm; Elise Navarro; Mateo Reyes; Sofia Kaplan; Malik Harris; Mason Thibodeaux; Noah Bennett