St. Peter, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 70°F 21°C	Observed at: St. Peter, IL	Elevation: 547 ft | 167 m
	Last Updated: July 29, 5:15 AM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 70°F | 21°C
	Pressure: 29.41 in | 996 mb	Dewpoint: 64°F | 18°C
	Humidity: 81%	Wind: NE 5 mph | NE 8 kph
	Feels Like: 74°F | 23°C	Visibility: 35.9 mi | 57.7 km
	Lat/Long: 38.5138 | -89.9016	Sunrise: 5:59 AM   Sunset: 8:12 PM

7 Day Graphical Forecast

Valid: 5:18 AM 7/29/2026

Tonight Clear 69 °F 1% Chance Precipitation Thursday Overcast 89 |66 °F 0% Chance Precipitation Friday Light Showers 81 |65 °F 64% Chance Precipitation Saturday Light Drizzle 77 |67 °F 64% Chance Precipitation Sunday Clear 81 |61 °F 26% Chance Precipitation Monday Clear 84 |64 °F 21% Chance Precipitation Tuesday Clear 86 |62 °F 8% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:18 AM 7/29/2026

5 AM Clear 71 °F 0% Chance Precipitation

6 AM Clear 69 °F 0% Chance Precipitation

7 AM Clear 70 °F 1% Chance Precipitation

8 AM Clear 72 °F 1% Chance Precipitation

9 AM Clear 75 °F 1% Chance Precipitation

10 AM Clear 78 °F 1% Chance Precipitation

11 AM Clear 81 °F 0% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for St. Peter, IL - (Fahrenheit & Celsius) Valid: 5:18 AM 7/29/2026 Tonight Clear with a low around 69°F [21°C]. NNE wind to around 10 mph [16 kph], with gusts to near 15 mph [23 kph]. Chance of precipitation 1% with QPF of 0.00 in [0.0 mm]. Thursday Overcast with a high near 89°F [32°C]. E wind to around 7 mph [10 kph], with gusts to near 13 mph [21 kph]. Dewpoint near 64°F [18°C] with humidity of 79%. Pressure around 29.41 in [996 mb]. UV Index: 7.25. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Night Overcast with a low around 66°F [19°C]. E wind to around 7 mph [10 kph], with gusts to near 13 mph [21 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Friday Light Showers with a high near 81°F [27°C]. SSE wind to around 16 mph [25 kph], with gusts to near 29 mph [47 kph]. Dewpoint near 64°F [18°C] with humidity of 92%. Pressure around 29.41 in [996 mb]. UV Index: 6.2. Chance of precipitation 64% with QPF of 0.23 in [5.9 mm]. Friday Night Light Showers with a low around 65°F [18°C]. SSE wind to around 16 mph [25 kph], with gusts to near 29 mph [47 kph]. Chance of precipitation 64% with QPF of 0.23 in [5.9 mm]. Saturday Light Drizzle with a high near 77°F [25°C]. NNE wind to around 15 mph [24 kph], with gusts to near 26 mph [41 kph]. Dewpoint near 64°F [18°C] with humidity of 98%. Pressure around 29.41 in [996 mb]. UV Index: 4.05. Chance of precipitation 64% with QPF of 0.06 in [1.4 mm]. Saturday Night Light Drizzle with a low around 67°F [20°C]. NNE wind to around 15 mph [24 kph], with gusts to near 26 mph [41 kph]. Chance of precipitation 64% with QPF of 0.06 in [1.4 mm]. Sunday Clear with a high near 81°F [27°C]. NNE wind to around 14 mph [22 kph], with gusts to near 25 mph [41 kph]. Dewpoint near 64°F [18°C] with humidity of 97%. Pressure around 29.41 in [996 mb]. UV Index: 7.4. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Sunday Night Clear with a low around 61°F [16°C]. NNE wind to around 14 mph [22 kph], with gusts to near 25 mph [41 kph]. Chance of precipitation 26% with QPF of 0.00 in [0.0 mm]. Monday Clear with a high near 84°F [29°C]. ENE wind to around 8 mph [13 kph], with gusts to near 11 mph [17 kph]. Dewpoint near 64°F [18°C] with humidity of 96%. Pressure around 29.41 in [996 mb]. UV Index: 7.45. Chance of precipitation 21% with QPF of 0.00 in [0.0 mm]. Monday Night Clear with a low around 64°F [18°C]. ENE wind to around 8 mph [13 kph], with gusts to near 11 mph [17 kph]. Chance of precipitation 21% with QPF of 0.00 in [0.0 mm]. Tuesday Clear with a high near 86°F [30°C]. E wind to around 7 mph [12 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 64°F [18°C] with humidity of 93%. Pressure around 29.41 in [996 mb]. UV Index: 7.5. Chance of precipitation 8% with QPF of 0.00 in [0.0 mm]. Tuesday Night Clear with a low around 62°F [16°C]. E wind to around 7 mph [12 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 8% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for St. Peter, IL

Tonight: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 5.9 mm | 0.23 in

Friday Night: 5.9 mm | 0.23 in

Saturday: 1.4 mm | 0.06 in

Saturday Night: 1.4 mm | 0.06 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for St. Peter, IL

Tonight: NNE @ 16 kph | 10 mph

Thursday: E @ 10 kph | 7 mph

Thursday Night: E @ 10 kph | 7 mph

Friday: SSE @ 25 kph | 16 mph

Friday Night: SSE @ 25 kph | 16 mph

Saturday: NNE @ 24 kph | 15 mph

Saturday Night: NNE @ 24 kph | 15 mph

Sunday: NNE @ 22 kph | 14 mph

Sunday Night: NNE @ 22 kph | 14 mph

Monday: ENE @ 13 kph | 8 mph

Monday Night: ENE @ 13 kph | 8 mph

Tuesday: E @ 12 kph | 7 mph

Tuesday Night: E @ 12 kph | 7 mph

7 Day and Night - Maximum Humidity Forecast for St. Peter, IL

Tonight: 86 %

Thursday: 79 %

Thursday Night: 79 %

Friday: 92 %

Friday Night: 92 %

Saturday: 98 %

Saturday Night: 98 %

Sunday: 97 %

Sunday Night: 97 %

Monday: 96 %

Monday Night: 96 %

Tuesday: 93 %

Tuesday Night: 93 %

7 Day and Night - Snowfall Totals Forecast for St. Peter, IL

Tonight: 0.0 cm | 0.00 in

Thursday: 0.0 cm | 0.00 in

Thursday Night: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

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