Current Conditions

Saint Peters, Missouri

78°F26°C

Hot

Wind

SW 7 mph11 km/h

Humidity

72%

Cloud Cover

13%

As of Wednesday, September 2, 2026 at 7:07 AM CDT

Today's Outlook

Day

Mostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon.

Night

Mostly clear, with a low around 81°F27°C. Breezy from the S at 7 to 8 mph11 to 13 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 101°F38°C	Low 78°F26°C	Precip 0 in0 mm—	Cloud 17%	Wind SSW 7 mph11 km/h	Wednesday: Mostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. Wednesday Night: Mostly clear, with a low around 81°F27°C. Breezy from the S at 7 to 8 mph11 to 13 km/h.
Hot	High 101°F38°C	Low 78°F25°C	Precip 0 in0 mm—	Cloud 9%	Wind SSW 6 mph10 km/h	Thursday: Mostly clear and hot, with a high of 101°F38°C and morning low of 78°F25°C. Light wind from the SW around 6 mph10 km/h. Heat risk in the afternoon. Thursday Night: Mostly clear, with a low around 80°F27°C. Breezy from the S at 6 to 8 mph10 to 12 km/h.
Hot	High 100°F38°C	Low 77°F25°C	Precip 0 in0 mm—	Cloud 11%	Wind SSW 4 mph7 km/h	Friday: Mostly clear and hot, with a high of 100°F38°C and morning low of 77°F25°C. Light wind from the SW around 4 mph6 km/h. Heat risk in the afternoon. Friday Night: Mostly clear, with a low around 80°F27°C. Breezy from the S at 5 to 7 mph8 to 11 km/h.
Drizzle	High 100°F38°C	Low 78°F26°C	Precip 0.02 in0.6 mm24%	Cloud 34%	Wind ESE 4 mph6 km/h	Saturday: Partly cloudy and hot, with a high of 100°F38°C and morning low of 78°F26°C. Light wind from the NNW around 3 mph5 km/h. 24% chance of drizzle in the afternoon. Heat risk in the afternoon. Saturday Night: Partly cloudy, with a low around 80°F27°C. Light wind from the ESE around 5 mph7 km/h. 22% chance of drizzle in the evening.
Drizzle	High 94°F34°CFeels 99°F37°C	Low 76°F24°C	Precip 0.02 in0.5 mm16%	Cloud 44%	Wind ENE 6 mph9 km/h	Sunday: Partly cloudy and hot, with a high of 94°F34°C and morning low of 76°F24°C. Light wind from the ENE around 5 mph9 km/h. 15% chance of drizzle in the afternoon. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 79°F26°C. Breezy from the ENE at 6 to 7 mph9 to 11 km/h. 16% chance of drizzle in the evening.
Clear	High 93°F34°C	Low 73°F23°C	Precip 0.01 in0.2 mm5%	Cloud 33%	Wind E 6 mph9 km/h	Monday: Partly cloudy and hot, with a high of 93°F34°C and morning low of 73°F23°C. Light wind from the ESE around 5 mph9 km/h. Monday Night: Partly cloudy, with a low around 75°F24°C. Breezy from the E at 6 to 7 mph10 to 11 km/h.
Hot	High 99°F37°C	Low 72°F22°C	Precip 0 in0 mm—	Cloud 24%	Wind SSE 6 mph10 km/h	Tuesday: Partly cloudy and hot, with a high of 99°F37°C and morning low of 72°F22°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. Tuesday Night: Mostly clear, with a low around 74°F23°C. Breezy from the SSE at 7 to 9 mph11 to 14 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	101°F38°C	78°F26°C	0 in0 mm· —	17%	Hot	SSW 7 mph11 km/h
DayMostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 81°F27°C. Breezy from the S at 7 to 8 mph11 to 13 km/h.
	ThursdaySep 3	101°F38°C	78°F25°C	0 in0 mm· —	9%	Hot	SSW 6 mph10 km/h
DayMostly clear and hot, with a high of 101°F38°C and morning low of 78°F25°C. Light wind from the SW around 6 mph10 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F27°C. Breezy from the S at 6 to 8 mph10 to 12 km/h.
	FridaySep 4	100°F38°C	77°F25°C	0 in0 mm· —	11%	Hot	SSW 4 mph7 km/h
DayMostly clear and hot, with a high of 100°F38°C and morning low of 77°F25°C. Light wind from the SW around 4 mph6 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F27°C. Breezy from the S at 5 to 7 mph8 to 11 km/h.
	SaturdaySep 5	100°F38°C	78°F26°C	0.02 in0.6 mm· 24%	34%	Drizzle	ESE 4 mph6 km/h
DayPartly cloudy and hot, with a high of 100°F38°C and morning low of 78°F26°C. Light wind from the NNW around 3 mph5 km/h. 24% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 80°F27°C. Light wind from the ESE around 5 mph7 km/h. 22% chance of drizzle in the evening.
	SundaySep 6	94°F34°C Feels 99°F37°C	76°F24°C	0.02 in0.5 mm· 16%	44%	Drizzle	ENE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 76°F24°C. Light wind from the ENE around 5 mph9 km/h. 15% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 79°F26°C. Breezy from the ENE at 6 to 7 mph9 to 11 km/h. 16% chance of drizzle in the evening.
	MondaySep 7	93°F34°C	73°F23°C	0.01 in0.2 mm· 5%	33%	Clear	E 6 mph9 km/h
DayPartly cloudy and hot, with a high of 93°F34°C and morning low of 73°F23°C. Light wind from the ESE around 5 mph9 km/h. NightPartly cloudy, with a low around 75°F24°C. Breezy from the E at 6 to 7 mph10 to 11 km/h.
	TuesdaySep 8	99°F37°C	72°F22°C	0 in0 mm· —	24%	Hot	SSE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 99°F37°C and morning low of 72°F22°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 74°F23°C. Breezy from the SSE at 7 to 9 mph11 to 14 km/h.
	WednesdaySep 9	99°F37°C	78°F26°C	0 in0.1 mm· 4%	19%	Hot	SSW 8 mph13 km/h
DayMostly clear and hot, with a high of 99°F37°C and morning low of 78°F26°C. Breezy from the SSW at 8 mph12 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F26°C. Breezy from the S at 8 to 9 mph13 to 14 km/h.
	ThursdaySep 10	96°F36°C Feels 99°F37°C	78°F25°C	0.04 in0.9 mm· 7%	29%	Hot	SSW 8 mph13 km/h
DayPartly cloudy and hot, with a high of 96°F36°C and morning low of 78°F25°C. Breezy from the SSW at 8 mph13 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 80°F27°C. Breezy from the S at 8 to 9 mph12 to 14 km/h.
	FridaySep 11	94°F34°C	76°F25°C	0.09 in2.3 mm· 16%	39%	Drizzle	SSW 7 mph12 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 76°F25°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 78°F26°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	SaturdaySep 12	90°F32°C	74°F24°C	0.19 in4.7 mm· 29%	54%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 74°F24°C. Breezy from the SSW at 8 mph12 km/h. 25% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 77°F25°C. Breezy from the S at 7 to 8 mph11 to 12 km/h. 29% chance of showers throughout the night.
	SundaySep 13	86°F30°C	71°F22°C	0.16 in4 mm· 23%	57%	Showers	SSW 7 mph11 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 71°F22°C. Breezy from the SW at 7 mph11 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 73°F23°C. Breezy from the S at 7 mph11 km/h. 23% chance of showers throughout the night.
	MondaySep 14	86°F30°C	69°F21°C	0.11 in2.9 mm· 17%	54%	Showers	S 7 mph11 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 69°F21°C. Breezy from the SSW at 7 mph11 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 71°F22°C. Breezy from the SSE at 7 mph11 km/h. 17% chance of showers throughout the night.
	TuesdaySep 15	86°F30°C	68°F20°C	0.09 in2.3 mm· 14%	47%	Showers	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 68°F20°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 70°F21°C. Breezy from the SSE at 7 mph11 km/h. 14% chance of showers throughout the night.
	WednesdaySep 16	85°F29°C	67°F19°C	0.11 in2.8 mm· 19%	41%	Showers	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 67°F19°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 19% chance of drizzle throughout the day. NightPartly cloudy, with a low around 69°F20°C. Breezy from the S at 7 mph11 km/h. 14% chance of showers 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

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