Climate Insights for Clinton

Weston County, Iowa, United States

Hottest
July
29°C peak
Coldest
January
-8°C low
Wettest
May
126mm rain
Best to Visit
July, August, September
Mild temps & low rain

Climate Overview

The climate in Clinton is temperate. The average annual temperature is 11°C and approximately 999mm of precipitation falls per year. Clinton receives a notable amount of rainfall throughout the year, including during its driest month. Clinton is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to -8°C. Snowfall occurs from January to December, with around 91cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 0° Average: -5° Min: -8° Feb Max: 3° Average: -2° Min: -6° Mar Max: 11° Average: 5° Min: 1° Apr Max: 16° Average: 10° Min: 5° May Max: 23° Average: 17° Min: 12° Jun Max: 29° Average: 23° Min: 18° Jul Max: 29° Average: 24° Min: 20° Aug Max: 28° Average: 23° Min: 18° Sep Max: 26° Average: 20° Min: 15° Oct Max: 19° Average: 13° Min: 8° Nov Max: 10° Average: 5° Min: 1° Dec Max: 3° Average: -1° Min: -4°
Max
Average
Min

Clinton has a wide annual temperature range, spanning 37°C from the coldest to warmest months. The warmest month is July, when average highs reach 29°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -8°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 8°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 55mm Snow: 28mm Feb Precipitation: 49mm Snow: 18mm Mar Precipitation: 96mm Snow: 15mm Apr Precipitation: 109mm Snow: 5mm May Precipitation: 126mm Snow: 0mm Jun Precipitation: 116mm Snow: 0mm Jul Precipitation: 93mm Snow: 0mm Aug Precipitation: 78mm Snow: 0mm Sep Precipitation: 86mm Snow: 0mm Oct Precipitation: 86mm Snow: 2mm Nov Precipitation: 52mm Snow: 9mm Dec Precipitation: 53mm Snow: 14mm
Precipitation
Snow

Clinton is a moderately rainy area, receiving approximately 999mm of precipitation annually, which averages out to around 83mm per month. The wettest month is May, averaging 126mm of rainfall. June and April also tend to see above-average precipitation. The driest month is February, with just 49mm. That's 76mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 91cm accumulating over the season. January typically sees the most snow at around 28cm.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 14km/h Feb Wind Speed: 15km/h Mar Wind Speed: 16km/h Apr Wind Speed: 16km/h May Wind Speed: 13km/h Jun Wind Speed: 12km/h Jul Wind Speed: 10km/h Aug Wind Speed: 10km/h Sep Wind Speed: 12km/h Oct Wind Speed: 14km/h Nov Wind Speed: 15km/h Dec Wind Speed: 14km/h
Wind Speed

Clinton is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 14km/h in winter, 15km/h in spring, 11km/h in summer, 14km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

8 days until Autumn

It is currently summer in Clinton, which began on June 21, 2026. Clinton is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 29°C, while the coldest stretch bottoms out in January near -8°C. Autumn is next, beginning on September 23, 2026 (8 days from now).

Spring

Temperatures range from 1 to 23°C. Rainfall is heavy, totalling around 330mm across the season with a monthly average of 110mm. Winds are generally light, averaging 15km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 18 to 29°C. Precipitation is moderate at around 287mm for the season, averaging 96mm per month. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

Autumn

Temperatures range from 1 to 26°C. Precipitation is moderate at around 224mm for the season, averaging 75mm per month. Expect around 11cm of snow accumulation during this period. Winds are generally light, averaging 14km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -8 to 3°C. Precipitation is moderate at around 157mm for the season, averaging 52mm per month. Expect around 60cm of snow accumulation during this period. Winds are generally light, averaging 14km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -5°
Feb -2°
Mar
Apr 10°
May 17°
Jun 23°
Jul 24°
Aug 23°
Sep 20°
Oct 13°
Nov
Dec -1°

The best time to visit Clinton is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 86mm per month. By contrast, January can be quite cold with temperatures dropping to -8°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

Monthly Climate Data

The table below shows monthly climate averages for Clinton based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-8 °C
0 °C
14 km/h
55 mm
28 cm
Feb
-6 °C
3 °C
15 km/h
49 mm
18 cm
Mar
1 °C
11 °C
16 km/h
96 mm
15 cm
Apr
5 °C
16 °C
16 km/h
109 mm
5 cm
May
12 °C
23 °C
13 km/h
126 mm
0 cm
Jun
18 °C
29 °C
12 km/h
116 mm
0 cm
Jul
20 °C
29 °C
10 km/h
93 mm
0 cm
Aug
18 °C
28 °C
10 km/h
78 mm
0 cm
Sep Current
15 °C
26 °C
12 km/h
86 mm
0 cm
Oct
8 °C
19 °C
14 km/h
86 mm
2 cm
Nov
1 °C
10 °C
15 km/h
52 mm
9 cm
Dec
-4 °C
3 °C
14 km/h
53 mm
14 cm
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Metric (°C, km/h)