Current Conditions

O'Fallon, Missouri

78°F25°C

Cloudy

Wind

ENE 4 mph6 km/h

Humidity

50%

Cloud Cover

86%

As of Thursday, July 23, 2026 at 2:02 PM CDT

Today's Outlook

Day

Overcast and warm, with a high of 80°F27°C. Light wind from the ENE around 4 mph6 km/h.

Night

Overcast, with a low around 72°F22°C. Light wind from the ENE around 5 mph8 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
ThursdayJul 23	Cloudy	High 80°F27°C	Low 72°F22°C	Precip 0 in0 mm—	Cloud 92%	Wind ENE 4 mph7 km/h	Thursday: Overcast and warm, with a high of 80°F27°C. Light wind from the ENE around 4 mph6 km/h. Thursday Night: Overcast, with a low around 72°F22°C. Light wind from the ENE around 5 mph8 km/h.
FridayJul 24	Rain	High 70°F21°C	Low 67°F20°C	Precip 0.43 in10.9 mm94%	Cloud 92%	Wind SE 5 mph8 km/h	Friday: Overcast and warm, with a high of 69°F21°C. Light wind from the SE around 5 mph7 km/h. 94% chance of rain throughout the day. Friday Night: Overcast, with a low around 69°F20°C. Light wind from the ESE around 5 mph8 km/h. 68% chance of light rain throughout the night.
SaturdayJul 25	Showers	High 90°F32°CFeels 101°F38°C	Low 69°F20°C	Precip 0.12 in3.1 mm57%	Cloud 57%	Wind S 4 mph7 km/h	Saturday: Mostly cloudy and hot, with a high of 90°F32°C and morning low of 70°F21°C — feels like 100°F38°C. Light wind from the SSW around 3 mph6 km/h. 53% chance of showers throughout the day. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 69°F20°C. Light wind from the SSE around 5 mph8 km/h. 57% chance of showers overnight.
SundayJul 26	Hot	High 99°F37°CFeels 113°F45°C	Low 77°F25°C	Precip 0.01 in0.3 mm7%	Cloud 45%	Wind SSW 4 mph7 km/h	Sunday: Mostly cloudy and hot, with a high of 99°F37°C and morning low of 77°F25°C — feels like 113°F45°C. Light wind from the SW around 4 mph6 km/h. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 77°F25°C. Light wind from the S around 5 mph8 km/h.
MondayJul 27	Drizzle	High 98°F37°CFeels 107°F42°C	Low 80°F27°C	Precip 0.02 in0.6 mm10%	Cloud 44%	Wind SW 7 mph11 km/h	Monday: Mostly cloudy and hot, with a high of 98°F37°C and morning low of 80°F27°C — feels like 108°F42°C. Breezy from the SW at 7 to 9 mph12 to 14 km/h. 10% chance of drizzle in the morning. Heat risk in the afternoon. Monday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the SSW at 7 mph11 km/h.
TuesdayJul 28	Drizzle	High 96°F36°CFeels 103°F39°C	Low 80°F27°C	Precip 0.02 in0.4 mm10%	Cloud 32%	Wind NW 6 mph10 km/h	Tuesday: Partly cloudy and hot, with a high of 96°F36°C and morning low of 80°F27°C — feels like 102°F39°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. Tuesday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle in the evening.
WednesdayJul 29	Clear	High 93°F34°C	Low 75°F24°C	Precip 0.01 in0.2 mm3%	Cloud 18%	Wind NE 5 mph9 km/h	Wednesday: Mostly clear and hot, with a high of 93°F34°C and morning low of 75°F24°C. Light wind from the NE around 5 mph8 km/h. Humid. Wednesday Night: Mostly clear, with a low around 76°F25°C. Light wind from the NE around 5 mph9 km/h.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	ThursdayJul 23	80°F27°C	72°F22°C	0 in0 mm· —	92%	Cloudy	ENE 4 mph7 km/h
DayOvercast and warm, with a high of 80°F27°C. Light wind from the ENE around 4 mph6 km/h. NightOvercast, with a low around 72°F22°C. Light wind from the ENE around 5 mph8 km/h.
	FridayJul 24	70°F21°C	67°F20°C	0.43 in10.9 mm· 94%	92%	Rain	SE 5 mph8 km/h
DayOvercast and warm, with a high of 69°F21°C. Light wind from the SE around 5 mph7 km/h. 94% chance of rain throughout the day. NightOvercast, with a low around 69°F20°C. Light wind from the ESE around 5 mph8 km/h. 68% chance of light rain throughout the night.
	SaturdayJul 25	90°F32°C Feels 101°F38°C	69°F20°C	0.12 in3.1 mm· 57%	57%	Showers	S 4 mph7 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 70°F21°C — feels like 100°F38°C. Light wind from the SSW around 3 mph6 km/h. 53% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 69°F20°C. Light wind from the SSE around 5 mph8 km/h. 57% chance of showers overnight.
	SundayJul 26	99°F37°C Feels 113°F45°C	77°F25°C	0.01 in0.3 mm· 7%	45%	Hot	SSW 4 mph7 km/h
DayMostly cloudy and hot, with a high of 99°F37°C and morning low of 77°F25°C — feels like 113°F45°C. Light wind from the SW around 4 mph6 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 77°F25°C. Light wind from the S around 5 mph8 km/h.
	MondayJul 27	98°F37°C Feels 107°F42°C	80°F27°C	0.02 in0.6 mm· 10%	44%	Drizzle	SW 7 mph11 km/h
DayMostly cloudy and hot, with a high of 98°F37°C and morning low of 80°F27°C — feels like 108°F42°C. Breezy from the SW at 7 to 9 mph12 to 14 km/h. 10% chance of drizzle in the morning. Heat risk in the afternoon. NightPartly cloudy, with a low around 81°F27°C. Breezy from the SSW at 7 mph11 km/h.
	TuesdayJul 28	96°F36°C Feels 103°F39°C	80°F27°C	0.02 in0.4 mm· 10%	32%	Drizzle	NW 6 mph10 km/h
DayPartly cloudy and hot, with a high of 96°F36°C and morning low of 80°F27°C — feels like 102°F39°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 81°F27°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle in the evening.
	WednesdayJul 29	93°F34°C	75°F24°C	0.01 in0.2 mm· 3%	18%	Clear	NE 5 mph9 km/h
DayMostly clear and hot, with a high of 93°F34°C and morning low of 75°F24°C. Light wind from the NE around 5 mph8 km/h. Humid. NightMostly clear, with a low around 76°F25°C. Light wind from the NE around 5 mph9 km/h.
	ThursdayJul 30	92°F33°C	73°F23°C	0.04 in0.9 mm· 14%	29%	Drizzle	ESE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 92°F33°C and morning low of 73°F23°C. Light wind from the SE around 5 mph8 km/h. Humid. NightPartly cloudy, with a low around 74°F23°C. Light wind from the ESE around 5 mph8 km/h. 14% chance of drizzle in the evening.
	FridayJul 31	92°F34°C Feels 95°F35°C	73°F23°C	0.06 in1.6 mm· 10%	34%	Drizzle	SSE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 92°F34°C and morning low of 73°F23°C. Light wind from the SSW around 5 mph8 km/h. 10% chance of drizzle throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 74°F23°C. Light wind from the SE around 5 mph8 km/h.
	SaturdayAug 1	93°F34°C	73°F23°C	0.05 in1.3 mm· 12%	30%	Drizzle	E 5 mph8 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 73°F23°C. Light wind from the NW around 5 mph8 km/h. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the ESE around 5 mph8 km/h. 12% chance of drizzle before dawn.
	SundayAug 2	93°F34°C	72°F22°C	0.06 in1.5 mm· 14%	36%	Drizzle	S 6 mph9 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 72°F22°C. Light wind from the SSW around 6 mph9 km/h. Humid. NightPartly cloudy, with a low around 74°F23°C. Light wind from the SSE around 6 mph9 km/h. 14% chance of drizzle throughout the night.
	MondayAug 3	93°F34°C	73°F23°C	0.08 in2 mm· 19%	42%	Drizzle	S 6 mph10 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 73°F23°C. Light wind from the SSW around 6 mph10 km/h. 14% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 74°F23°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 19% chance of drizzle throughout the night.
	TuesdayAug 4	93°F34°C	75°F24°C	0.12 in3 mm· 17%	48%	Showers	SSW 7 mph11 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C. Breezy from the SW at 7 mph11 km/h. 15% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F24°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 17% chance of showers throughout the night.
	WednesdayAug 5	90°F32°C	73°F23°C	0.07 in1.8 mm· 15%	48%	Drizzle	SW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 73°F23°C. Light wind from the WSW around 6 mph10 km/h. 14% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the SSW around 6 mph9 km/h. 15% chance of drizzle throughout the night.
	ThursdayAug 6	90°F32°C	72°F22°C	0.09 in2.3 mm· 16%	44%	Showers	SSW 6 mph9 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 72°F22°C. Light wind from the WSW around 6 mph9 km/h. 16% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 73°F23°C. Light wind from the S around 6 mph9 km/h. 14% chance of showers throughout the night.

Nearby Cities

Saint Peters4 mi6 km Wentzville8 mi13 km Saint Charles12 mi19 km Chesterfield12 mi20 km Wildwood16 mi26 km Maryland Heights16 mi26 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 38.8106°N, 90.6998°W·Elevation: 165m·Timezone: America/Chicago·Population: 85,040