Climate Insights for Clinton

Lower Connecticut River Valley Planning Region, Connecticut, United States

Hottest
July
25°C peak
Coldest
February
-1°C low
Wettest
December
150mm rain
Best to Visit
June, August
Mild temps & low rain

Climate Overview

The climate in Clinton is temperate. The average annual temperature is 12°C and approximately 1278mm 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, August, September. The coldest months are February, January, March, when temperatures can drop to -1°C. Snowfall occurs from January to December, with around 62cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 4° Average: 1° Min: -1° Feb Max: 4° Average: 1° Min: -1° Mar Max: 7° Average: 4° Min: 2° Apr Max: 11° Average: 8° Min: 6° May Max: 16° Average: 14° Min: 11° Jun Max: 21° Average: 19° Min: 17° Jul Max: 25° Average: 23° Min: 21° Aug Max: 25° Average: 23° Min: 21° Sep Max: 22° Average: 20° Min: 18° Oct Max: 18° Average: 15° Min: 13° Nov Max: 12° Average: 9° Min: 7° Dec Max: 7° Average: 5° Min: 2°
Max
Average
Min

Temperatures in Clinton vary considerably across the year, with a 26°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 25°C and the mean temperature sits around 23°C. The coldest month is February, when overnight lows fall to -1°C and the daily average is 1°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between October and November, with a 6°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: 114mm Snow: 17mm Feb Precipitation: 100mm Snow: 20mm Mar Precipitation: 113mm Snow: 16mm Apr Precipitation: 115mm Snow: 2mm May Precipitation: 92mm Snow: 0mm Jun Precipitation: 82mm Snow: 0mm Jul Precipitation: 103mm Snow: 0mm Aug Precipitation: 85mm Snow: 0mm Sep Precipitation: 108mm Snow: 0mm Oct Precipitation: 126mm Snow: 0mm Nov Precipitation: 91mm Snow: 1mm Dec Precipitation: 150mm Snow: 7mm
Precipitation
Snow

Clinton is a fairly wet location, receiving approximately 1278mm of precipitation annually, which averages out to around 106mm per month. The wettest month is December, averaging 150mm of rainfall. October and April also tend to see above-average precipitation. The driest month is June, with just 82mm. That's 68mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 62cm accumulating over the season. February typically sees the most snow at around 20cm.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h 30km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 30km/h Feb Wind Speed: 29km/h Mar Wind Speed: 29km/h Apr Wind Speed: 27km/h May Wind Speed: 24km/h Jun Wind Speed: 22km/h Jul Wind Speed: 21km/h Aug Wind Speed: 21km/h Sep Wind Speed: 23km/h Oct Wind Speed: 27km/h Nov Wind Speed: 29km/h Dec Wind Speed: 29km/h
Wind Speed

Clinton is moderately windy, with an average annual wind speed of 26km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 30km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 21km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/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 29km/h in winter, 26km/h in spring, 21km/h in summer, 26km/h in autumn.

Seasons

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

89 days until Summer

It is currently spring in Clinton, which began on March 20, 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 25°C, while the coldest stretch bottoms out in February near -1°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 2 to 16°C. Rainfall is heavy, totalling around 319mm across the season with a monthly average of 106mm. Winds are strong, averaging 26km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 17 to 25°C. Precipitation is moderate at around 270mm for the season, averaging 90mm per month. Winds are moderate at around 21km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 7 to 22°C. Rainfall is heavy, totalling around 325mm across the season with a monthly average of 108mm. Winds are strong, averaging 26km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -1 to 7°C. Rainfall is heavy, totalling around 364mm across the season with a monthly average of 121mm. Expect around 43cm of snow accumulation during this period. Winds are strong, averaging 29km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan
Feb
Mar
Apr
May 14°
Jun 19°
Jul 23°
Aug 23°
Sep 20°
Oct 15°
Nov
Dec

The best time to visit Clinton is during June and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 83mm per month. By contrast, July can be uncomfortably hot with highs reaching 25°C, while February is the coldest period with lows dropping to -1°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
-1 °C
4 °C
30 km/h
114 mm
17 cm
Feb
-1 °C
4 °C
29 km/h
100 mm
20 cm
Mar Current
2 °C
7 °C
29 km/h
113 mm
16 cm
Apr
6 °C
11 °C
27 km/h
115 mm
2 cm
May
11 °C
16 °C
24 km/h
92 mm
0 cm
Jun
17 °C
21 °C
22 km/h
82 mm
0 cm
Jul
21 °C
25 °C
21 km/h
103 mm
0 cm
Aug
21 °C
25 °C
21 km/h
85 mm
0 cm
Sep
18 °C
22 °C
23 km/h
108 mm
0 cm
Oct
13 °C
18 °C
27 km/h
126 mm
0 cm
Nov
7 °C
12 °C
29 km/h
91 mm
1 cm
Dec
2 °C
7 °C
29 km/h
150 mm
7 cm
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