Plymouth, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Heavy Showers 78°F 26°C Heat Index: 78°F	Observed at: Plymouth, IL	Elevation: 778 ft | 237 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Heavy Showers	Temperature: 78°F | 26°C
	Pressure: 29.31 in | 992.7 mb	Dewpoint: 74°F | 23°C
	Humidity: 86%	Wind: WNW 3 mph | WNW 5 kph
	Feels Like: 87°F | 31°C	Visibility: 5.9 mi | 9.5 km
	Lat/Long: 40.2917 | -90.9189	Sunrise: 5:47 AM   Sunset: 8:31 PM

7 Day Graphical Forecast

Valid: 10:34 PM 7/16/2026

Tonight Heavy Showers 69 °F 4% Chance Precipitation Friday Overcast 92 |73 °F 25% Chance Precipitation Saturday Light Drizzle 96 |76 °F 38% Chance Precipitation Sunday Drizzle 85 |70 °F 14% Chance Precipitation Monday Light Drizzle 93 |70 °F 11% Chance Precipitation Tuesday Overcast 86 |66 °F 17% Chance Precipitation Wednesday Overcast 71 |53 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:34 PM 7/16/2026

10 PM Heavy Showers 79 °F 2% Chance Precipitation

11 PM Overcast 78 °F 2% Chance Precipitation

12 AM Overcast 78 °F 3% Chance Precipitation

1 AM Partly Cloudy 76 °F 4% Chance Precipitation

2 AM Overcast 76 °F 6% Chance Precipitation

3 AM Partly Cloudy 75 °F 7% Chance Precipitation

4 AM Mostly Clear 74 °F 7% Chance Precipitation

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

7 Day & Night Weather Forecast for Plymouth, IL - (Fahrenheit & Celsius) Valid: 10:34 PM 7/16/2026 Tonight Heavy Showers with a low around 69°F [21°C]. SW wind to around 6 mph [9 kph], with gusts to near 9 mph [14 kph]. Chance of precipitation 4% with QPF of 0.99 in [25.2 mm]. Friday Overcast with a high near 92°F [33°C]. WSW wind to around 14 mph [23 kph], with gusts to near 19 mph [30 kph]. Dewpoint near 74°F [23°C] with humidity of 93%. Pressure around 29.31 in [992.7 mb]. UV Index: 7.7. Chance of precipitation 25% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 73°F [23°C]. WSW wind to around 14 mph [23 kph], with gusts to near 19 mph [30 kph]. Chance of precipitation 25% with QPF of 0.00 in [0.0 mm]. Saturday Light Drizzle with a high near 96°F [35°C]. W wind to around 13 mph [22 kph], with gusts to near 29 mph [46 kph]. Dewpoint near 74°F [23°C] with humidity of 92%. Pressure around 29.31 in [992.7 mb]. UV Index: 7.8. Chance of precipitation 38% with QPF of 0.02 in [0.6 mm]. Saturday Night Light Drizzle with a low around 76°F [25°C]. W wind to around 13 mph [22 kph], with gusts to near 29 mph [46 kph]. Chance of precipitation 38% with QPF of 0.02 in [0.6 mm]. Sunday Drizzle with a high near 85°F [29°C]. E wind to around 10 mph [16 kph], with gusts to near 21 mph [34 kph]. Dewpoint near 74°F [23°C] with humidity of 95%. Pressure around 29.31 in [992.7 mb]. UV Index: 6.95. Chance of precipitation 14% with QPF of 0.10 in [2.6 mm]. Sunday Night Drizzle with a low around 70°F [21°C]. E wind to around 10 mph [16 kph], with gusts to near 21 mph [34 kph]. Chance of precipitation 14% with QPF of 0.10 in [2.6 mm]. Monday Light Drizzle with a high near 93°F [34°C]. S wind to around 10 mph [16 kph], with gusts to near 25 mph [41 kph]. Dewpoint near 74°F [23°C] with humidity of 97%. Pressure around 29.31 in [992.7 mb]. UV Index: 7.85. Chance of precipitation 11% with QPF of 0.02 in [0.6 mm]. Monday Night Light Drizzle with a low around 70°F [21°C]. S wind to around 10 mph [16 kph], with gusts to near 25 mph [41 kph]. Chance of precipitation 11% with QPF of 0.02 in [0.6 mm]. Tuesday Overcast with a high near 86°F [30°C]. WNW wind to around 20 mph [32 kph], with gusts to near 38 mph [61 kph]. Dewpoint near 74°F [23°C] with humidity of 76%. Pressure around 29.31 in [992.7 mb]. UV Index: 7.25. Chance of precipitation 17% with QPF of 0.00 in [0.0 mm]. Tuesday Night Overcast with a low around 66°F [19°C]. WNW wind to around 20 mph [32 kph], with gusts to near 38 mph [61 kph]. Chance of precipitation 17% with QPF of 0.00 in [0.0 mm]. Wednesday Overcast with a high near 71°F [22°C]. NNE wind to around 12 mph [20 kph], with gusts to near 27 mph [44 kph]. Dewpoint near 74°F [23°C] with humidity of 86%. Pressure around 29.31 in [992.7 mb]. UV Index: 7.65. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 53°F [12°C]. NNE wind to around 12 mph [20 kph], with gusts to near 27 mph [44 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Plymouth, IL

Tonight: 25.2 mm | 0.99 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 0.6 mm | 0.02 in

Saturday Night: 0.6 mm | 0.02 in

Sunday: 2.6 mm | 0.10 in

Sunday Night: 2.6 mm | 0.10 in

Monday: 0.6 mm | 0.02 in

Monday Night: 0.6 mm | 0.02 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Plymouth, IL

Tonight: SW @ 9 kph | 6 mph

Friday: WSW @ 23 kph | 14 mph

Friday Night: WSW @ 23 kph | 14 mph

Saturday: W @ 22 kph | 13 mph

Saturday Night: W @ 22 kph | 13 mph

Sunday: E @ 16 kph | 10 mph

Sunday Night: E @ 16 kph | 10 mph

Monday: S @ 16 kph | 10 mph

Monday Night: S @ 16 kph | 10 mph

Tuesday: WNW @ 32 kph | 20 mph

Tuesday Night: WNW @ 32 kph | 20 mph

Wednesday: NNE @ 20 kph | 12 mph

Wednesday Night: NNE @ 20 kph | 12 mph

7 Day and Night - Maximum Humidity Forecast for Plymouth, IL

Tonight: 98 %

Friday: 93 %

Friday Night: 93 %

Saturday: 92 %

Saturday Night: 92 %

Sunday: 95 %

Sunday Night: 95 %

Monday: 97 %

Monday Night: 97 %

Tuesday: 76 %

Tuesday Night: 76 %

Wednesday: 86 %

Wednesday Night: 86 %

7 Day and Night - Snowfall Totals Forecast for Plymouth, IL

Tonight: 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

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

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