Current Conditions

Saint Peters, Missouri

75°F24°C

Drizzle

Wind

SSE 4 mph7 km/h

Humidity

89%

Cloud Cover

77%

As of Thursday, August 13, 2026 at 3:55 AM CDT

Today's Outlook

Day

Overcast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 104°F40°C. Light wind from the SSE around 5 mph7 km/h. 11% chance of drizzle in the morning. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 14 km/h. 18% chance of drizzle throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 94°F34°CFeels 103°F40°C	Low 75°F24°C	Precip 0.04 in0.9 mm18%	Cloud 86%	Wind SE 5 mph8 km/h	Thursday: Overcast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 104°F40°C. Light wind from the SSE around 5 mph7 km/h. 11% chance of drizzle in the morning. Heat risk in the afternoon. Thursday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 14 km/h. 18% chance of drizzle throughout the night.
Drizzle	High 95°F35°CFeels 103°F39°C	Low 78°F26°C	Precip 0.02 in0.4 mm11%	Cloud 77%	Wind SSE 6 mph9 km/h	Friday: Overcast and hot, with a high of 95°F35°C and morning low of 78°F26°C — feels like 102°F39°C. Light wind from the SSE around 5 mph7 km/h. 11% chance of drizzle in the morning. Heat risk in the afternoon. Friday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h.
Drizzle	High 97°F36°CFeels 103°F40°C	Low 79°F26°C	Precip 0.03 in0.7 mm13%	Cloud 66%	Wind S 6 mph9 km/h	Saturday: Overcast and hot, with a high of 97°F36°C and morning low of 79°F26°C — feels like 104°F40°C. Light wind from the SSW around 5 mph9 km/h. 12% chance of drizzle in the morning. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 7 mph9 to 11 km/h. 13% chance of drizzle before dawn.
Drizzle	High 97°F36°CFeels 105°F41°C	Low 80°F27°C	Precip 0.04 in0.9 mm21%	Cloud 46%	Wind WNW 6 mph10 km/h	Sunday: Partly cloudy and hot, with a high of 97°F36°C and morning low of 80°F27°C — feels like 106°F41°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 13% chance of drizzle in the afternoon. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 82°F28°C. Breezy from the WNW at 7 mph11 km/h. 21% chance of drizzle in the evening.
Drizzle	High 87°F31°C	Low 73°F23°C	Precip 0.02 in0.5 mm10%	Cloud 54%	Wind N 5 mph9 km/h	Monday: Mostly cloudy and hot, with a high of 87°F31°C and morning low of 73°F23°C. Light wind from the NNW around 6 mph9 km/h. Humid. Monday Night: Partly cloudy, with a low around 75°F24°C. Light wind from the N around 5 mph8 km/h. 10% chance of drizzle overnight.
Hot	High 92°F34°CFeels 95°F35°C	Low 70°F21°C	Precip 0.02 in0.5 mm5%	Cloud 22%	Wind ESE 5 mph7 km/h	Tuesday: Mostly clear and hot, with a high of 92°F34°C and morning low of 70°F21°C. Light wind from the SE around 4 mph6 km/h. Heat risk in the afternoon. Tuesday Night: Mostly clear, with a low around 71°F22°C. Breezy from the ESE at 5 to 8 mph8 to 12 km/h.
Drizzle	High 97°F36°C	Low 77°F25°C	Precip 0.03 in0.8 mm15%	Cloud 47%	Wind SSW 8 mph12 km/h	Wednesday: Mostly cloudy and hot, with a high of 97°F36°C and morning low of 77°F25°C. Breezy from the SW at 8 mph12 km/h. 10% chance of drizzle. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 78°F26°C. Breezy from the SSE at 7 to 9 mph12 to 14 km/h. 15% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	94°F34°C Feels 103°F40°C	75°F24°C	0.04 in0.9 mm· 18%	86%	Drizzle	SE 5 mph8 km/h
DayOvercast and hot, with a high of 94°F34°C and morning low of 75°F24°C — feels like 104°F40°C. Light wind from the SSE around 5 mph7 km/h. 11% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 14 km/h. 18% chance of drizzle throughout the night.
	FridayAug 14	95°F35°C Feels 103°F39°C	78°F26°C	0.02 in0.4 mm· 11%	77%	Drizzle	SSE 6 mph9 km/h
DayOvercast and hot, with a high of 95°F35°C and morning low of 78°F26°C — feels like 102°F39°C. Light wind from the SSE around 5 mph7 km/h. 11% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h.
	SaturdayAug 15	97°F36°C Feels 103°F40°C	79°F26°C	0.03 in0.7 mm· 13%	66%	Drizzle	S 6 mph9 km/h
DayOvercast and hot, with a high of 97°F36°C and morning low of 79°F26°C — feels like 104°F40°C. Light wind from the SSW around 5 mph9 km/h. 12% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 6 to 7 mph9 to 11 km/h. 13% chance of drizzle before dawn.
	SundayAug 16	97°F36°C Feels 105°F41°C	80°F27°C	0.04 in0.9 mm· 21%	46%	Drizzle	WNW 6 mph10 km/h
DayPartly cloudy and hot, with a high of 97°F36°C and morning low of 80°F27°C — feels like 106°F41°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 13% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 82°F28°C. Breezy from the WNW at 7 mph11 km/h. 21% chance of drizzle in the evening.
	MondayAug 17	87°F31°C	73°F23°C	0.02 in0.5 mm· 10%	54%	Drizzle	N 5 mph9 km/h
DayMostly cloudy and hot, with a high of 87°F31°C and morning low of 73°F23°C. Light wind from the NNW around 6 mph9 km/h. Humid. NightPartly cloudy, with a low around 75°F24°C. Light wind from the N around 5 mph8 km/h. 10% chance of drizzle overnight.
	TuesdayAug 18	92°F34°C Feels 95°F35°C	70°F21°C	0.02 in0.5 mm· 5%	22%	Hot	ESE 5 mph7 km/h
DayMostly clear and hot, with a high of 92°F34°C and morning low of 70°F21°C. Light wind from the SE around 4 mph6 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 71°F22°C. Breezy from the ESE at 5 to 8 mph8 to 12 km/h.
	WednesdayAug 19	97°F36°C	77°F25°C	0.03 in0.8 mm· 15%	47%	Drizzle	SSW 8 mph12 km/h
DayMostly cloudy and hot, with a high of 97°F36°C and morning low of 77°F25°C. Breezy from the SW at 8 mph12 km/h. 10% chance of drizzle. Heat risk in the afternoon. NightPartly cloudy, with a low around 78°F26°C. Breezy from the SSE at 7 to 9 mph12 to 14 km/h. 15% chance of drizzle throughout the night.
	ThursdayAug 20	88°F31°C	73°F23°C	0.07 in1.9 mm· 17%	44%	Showers	N 6 mph10 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 73°F23°C. Light wind from the NNW around 6 mph10 km/h. 12% chance of drizzle in the morning. Humid. NightPartly cloudy, with a low around 76°F24°C. Breezy from the NNE at 6 to 7 mph10 to 11 km/h. 17% chance of showers throughout the night.
	FridayAug 21	86°F30°C	69°F21°C	0.07 in1.7 mm· 11%	41%	Drizzle	NE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 86°F30°C and morning low of 69°F21°C. Light wind from the NNE around 5 mph9 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F22°C. Light wind from the NE around 6 mph9 km/h. 11% chance of drizzle throughout the night.
	SaturdayAug 22	88°F31°C	68°F20°C	0.04 in1 mm· 9%	32%	Clear	E 6 mph9 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Light wind from the E around 6 mph9 km/h. NightPartly cloudy, with a low around 70°F21°C. Light wind from the ENE around 6 mph9 km/h.
	SundayAug 23	90°F32°C	69°F21°C	0.02 in0.4 mm· 5%	29%	Clear	ESE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 69°F21°C. Light wind from the ESE around 5 mph9 km/h. NightMostly clear, with a low around 70°F21°C. Light wind from the E around 6 mph9 km/h.
	MondayAug 24	92°F33°C	70°F21°C	0.02 in0.5 mm· 5%	28%	Clear	ESE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 92°F33°C and morning low of 70°F21°C. Light wind from the SE around 6 mph9 km/h. NightMostly clear, with a low around 72°F22°C. Light wind from the ESE around 6 mph9 km/h.
	TuesdayAug 25	92°F33°C	70°F21°C	0.02 in0.4 mm· 6%	32%	Clear	ESE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 92°F33°C and morning low of 70°F21°C. Light wind from the SE around 5 mph8 km/h. NightPartly cloudy, with a low around 72°F22°C. Light wind from the ESE around 6 mph9 km/h.
	WednesdayAug 26	92°F33°C	71°F22°C	0.03 in0.7 mm· 8%	38%	Clear	E 6 mph9 km/h
DayPartly cloudy and hot, with a high of 92°F33°C and morning low of 71°F22°C. Light wind from the ENE around 5 mph9 km/h. NightPartly cloudy, with a low around 73°F23°C. Light wind from the E around 6 mph9 km/h.
	ThursdayAug 27	90°F32°C	70°F21°C	0.05 in1.2 mm· 15%	43%	Drizzle	ENE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 70°F21°C. Light wind from the NE around 5 mph9 km/h. 15% chance of drizzle around midday. NightPartly cloudy, with a low around 73°F23°C. Light wind from the ENE around 6 mph9 km/h. 13% chance of drizzle throughout the night.

Nearby Cities

O'Fallon4 mi6 km Saint Charles8 mi13 km Chesterfield10 mi16 km Maryland Heights12 mi20 km Wentzville12 mi20 km Hazelwood14 mi22 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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 38.8003°N, 90.6265°W·Elevation: 134m·Timezone: America/Chicago·Population: 52,575