Current Conditions

O'Fallon, Missouri

69°F20°C

Clear

Wind

SW 8 mph13 km/h

Humidity

65%

Cloud Cover

As of Tuesday, October 13, 2026 at 6:00 AM CDT

Today's Outlook

Night

Mostly clear, with a low around 78°F25°C. Breezy from the SSW at 9 mph14 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 83°F28°C	Low 78°F25°C	Precip 0 in0 mm—	Cloud 5%	Wind SSW 9 mph14 km/h	Monday Night: Mostly clear, with a low around 78°F25°C. Breezy from the SSW at 9 mph14 km/h.
Clear	High 89°F31°CFeels 93°F34°C	Low 69°F20°C	Precip 0 in0 mm—	Cloud 9%	Wind SW 8 mph12 km/h	Tuesday: Mostly clear and hot, with a high of 89°F31°C and morning low of 69°F20°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. Humid. Tuesday Night: Mostly clear, with a low around 69°F21°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h.
Rain	High 79°F26°C	Low 67°F20°C	Precip 0.39 in9.8 mm91%	Cloud 89%	Wind NW 6 mph9 km/h	Wednesday: Overcast and warm, with a high of 72°F22°C. Light wind from the NNW around 5 mph8 km/h. 91% chance of rain in the morning. Humid. Wednesday Night: Overcast, with a low around 67°F20°C. Breezy from the W at 7 to 8 mph11 to 14 km/h. 25% chance of drizzle before dawn.
Rain	High 72°F22°C	Low 62°F17°C	Precip 0.48 in12.2 mm84%	Cloud 89%	Wind WSW 8 mph12 km/h	Thursday: Overcast and warm, with a high of 72°F22°C and morning low of 65°F18°C. Breezy from the SSW at 7 to 8 mph12 to 14 km/h. 84% chance of rain in the morning. Humid. Thursday Night: Overcast, with a low around 62°F17°C. Breezy from the NW at 8 to 12 mph13 to 20 km/h. 64% chance of light rain overnight.
Showers	High 59°F15°C	Low 47°F8°CFeels 43°F6°C	Precip 0.04 in1 mm47%	Cloud 66%	Wind NW 13 mph21 km/h	Friday: Mostly cloudy and mild, with a high of 54°F12°C and morning low of 49°F9°C. Windy from the NW at 15 to 16 mph24 to 26 km/h. Dry air. Friday Night: Mostly cloudy, with a low around 47°F8°C. Breezy from the NW at 12 to 14 mph19 to 23 km/h. 47% chance of showers overnight.
Clear	High 56°F13°C	Low 38°F3°CFeels 34°F1°C	Precip 0 in0 mm—	Cloud 5%	Wind NNE 6 mph9 km/h	Saturday: Mostly clear and mild, with a high of 56°F13°C and morning low of 38°F3°C. Light wind from the ENE around 5 mph8 km/h. Dry air. Saturday Night: Mostly clear, with a low around 39°F4°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h.
Clear	High 63°F17°C	Low 39°F4°CFeels 34°F1°C	Precip 0 in0 mm—	Cloud 19%	Wind SSE 8 mph12 km/h	Sunday: Mostly clear and mild, with a high of 63°F17°C and morning low of 39°F4°C. Breezy from the S at 8 mph12 km/h. Dry air. Sunday Night: Mostly clear, with a low around 39°F4°C. Breezy from the SSE at 8 mph12 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	MondayOct 12	83°F28°C	78°F25°C	0 in0 mm· —	5%	Clear	SSW 9 mph14 km/h
NightMostly clear, with a low around 78°F25°C. Breezy from the SSW at 9 mph14 km/h.
	TuesdayOct 13	89°F31°C Feels 93°F34°C	69°F20°C	0 in0 mm· —	9%	Clear	SW 8 mph12 km/h
DayMostly clear and hot, with a high of 89°F31°C and morning low of 69°F20°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. Humid. NightMostly clear, with a low around 69°F21°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h.
	WednesdayOct 14	79°F26°C	67°F20°C	0.39 in9.8 mm· 91%	89%	Rain	NW 6 mph9 km/h
DayOvercast and warm, with a high of 72°F22°C. Light wind from the NNW around 5 mph8 km/h. 91% chance of rain in the morning. Humid. NightOvercast, with a low around 67°F20°C. Breezy from the W at 7 to 8 mph11 to 14 km/h. 25% chance of drizzle before dawn.
	ThursdayOct 15	72°F22°C	62°F17°C	0.48 in12.2 mm· 84%	89%	Rain	WSW 8 mph12 km/h
DayOvercast and warm, with a high of 72°F22°C and morning low of 65°F18°C. Breezy from the SSW at 7 to 8 mph12 to 14 km/h. 84% chance of rain in the morning. Humid. NightOvercast, with a low around 62°F17°C. Breezy from the NW at 8 to 12 mph13 to 20 km/h. 64% chance of light rain overnight.
	FridayOct 16	59°F15°C	47°F8°C Feels 43°F6°C	0.04 in1 mm· 47%	66%	Showers	NW 13 mph21 km/h
DayMostly cloudy and mild, with a high of 54°F12°C and morning low of 49°F9°C. Windy from the NW at 15 to 16 mph24 to 26 km/h. Dry air. NightMostly cloudy, with a low around 47°F8°C. Breezy from the NW at 12 to 14 mph19 to 23 km/h. 47% chance of showers overnight.
	SaturdayOct 17	56°F13°C	38°F3°C Feels 34°F1°C	0 in0 mm· —	5%	Clear	NNE 6 mph9 km/h
DayMostly clear and mild, with a high of 56°F13°C and morning low of 38°F3°C. Light wind from the ENE around 5 mph8 km/h. Dry air. NightMostly clear, with a low around 39°F4°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h.
	SundayOct 18	63°F17°C	39°F4°C Feels 34°F1°C	0 in0 mm· —	19%	Clear	SSE 8 mph12 km/h
DayMostly clear and mild, with a high of 63°F17°C and morning low of 39°F4°C. Breezy from the S at 8 mph12 km/h. Dry air. NightMostly clear, with a low around 39°F4°C. Breezy from the SSE at 8 mph12 km/h.
	MondayOct 19	67°F20°C	47°F9°C Feels 44°F7°C	0.01 in0.2 mm· 5%	43%	Partly Cloudy	S 7 mph11 km/h
DayPartly cloudy and mild, with a high of 67°F20°C and morning low of 47°F9°C. Breezy from the S at 7 mph11 km/h. Dry air. NightPartly cloudy, with a low around 48°F9°C. Breezy from the S at 7 to 8 mph11 to 13 km/h.
	TuesdayOct 20	71°F22°C	51°F11°C	0.04 in0.9 mm· 10%	31%	Drizzle	SSE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 51°F11°C. Light wind from the SSE around 6 mph10 km/h. NightPartly cloudy, with a low around 51°F11°C. Breezy from the SSE at 7 mph11 km/h. 10% chance of drizzle in the evening.
	WednesdayOct 21	72°F22°C	57°F14°C	0.14 in3.6 mm· 20%	54%	Showers	SSE 7 mph12 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 57°F14°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. 20% chance of drizzle in the morning. NightMostly cloudy, with a low around 58°F14°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h. 19% chance of showers overnight.
	ThursdayOct 22	71°F22°C	61°F16°C	0.26 in6.7 mm· 33%	75%	Light Rain	S 8 mph12 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 61°F16°C. Breezy from the S at 8 mph12 km/h. 33% chance of light rain in the morning. NightMostly cloudy, with a low around 61°F16°C. Breezy from the S at 8 mph13 km/h. 26% chance of light rain overnight.
	FridayOct 23	69°F20°C	59°F15°C	0.26 in6.6 mm· 34%	73%	Light Rain	S 8 mph12 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 59°F15°C. Breezy from the S at 8 mph12 km/h. 34% chance of light rain in the morning. NightMostly cloudy, with a low around 59°F15°C. Breezy from the S at 8 mph12 km/h. 28% chance of light rain overnight.
	SaturdayOct 24	67°F19°C	56°F14°C	0.19 in4.8 mm· 28%	66%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 56°F14°C. Breezy from the SSW at 7 to 8 mph12 to 12 km/h. 28% chance of showers in the morning. NightMostly cloudy, with a low around 57°F14°C. Breezy from the SSW at 8 mph12 km/h. 28% chance of showers overnight.
	SundayOct 25	63°F17°C	52°F11°C	0.13 in3.2 mm· 19%	63%	Showers	WSW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 63°F17°C and morning low of 52°F11°C. Breezy from the W at 7 mph11 km/h. 19% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 53°F12°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h. 15% chance of showers overnight.
	MondayOct 26	60°F16°C	49°F9°C Feels 46°F8°C	0.08 in2.1 mm· 15%	60%	Drizzle	WNW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 60°F16°C and morning low of 49°F9°C. Breezy from the WNW at 7 mph11 km/h. 15% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 49°F10°C. Breezy from the W at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle overnight.

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