Climate and monthly weather forecastWest Haven, CT
Climate and monthly weather forecast
The climate of West Haven
West Haven, located in Connecticut, USA, experiences a Humid subtropical climate, denoted by the Köppen climate classification as 'Cfa'. This indicates no dry season, rendering generally moist and temperate weather patterns throughout the year.The climate of West Haven exhibits a smoothly transitioning gradient of conditions across the year. The monthly high temperatures flow from 35.1°F (1.7°C) in January to a peak of 80.4°F (26.9°C) in July, afterwards subiding back to around 41.7°F (5.4°C) by December. Correspondingly, monthly low temperatures rise from a chilly 25.5°F (-3.6°C) in January to a comfortably warm 67.6°F (19.8°C) in July, decreasing thereafter to around freezing by December.
The mean annual relative humidity remains relatively stable, hovering around 72% to 76%, hinting towards a characteristically moist atmosphere. Rainfall steadily increases from 2.4" (61mm) in January to a peak of 3.54" (90mm) in October before slightly dropping to around 3.86" (98mm) in December. Intriguingly, the number of snowfall days sharply decreases from 6.1 days in January to virtually none from May to September, only to see minor occurrences towards the year end, with January and February experiencing noticeable amounts of snowfall.
The average length of days ranges from a minimum of 9.6 hours of daylight in January, extending to a maximum of 15.1 hours in June and reducing back to approximately 9 hours by December. The average sunshine duration follows a similar trajectory, with fewer hours in the less sunny winter months and more in the sunnier summer season.
The best time to visit West Haven
Given this varied climate pattern, the ideal time to visit West Haven may largely depend on the visitor's weather preferences. Generally, the months from May to September offer the most favorable conditions. The temperature range falls between 65.1°F (18.4°C) and 79.7°F (26.5°C), providing suitable weather for outdoor exploration. Precipitation varies slightly, ranging from 2.76" (70mm) to 3.43" (87mm). Furthermore, daily sunshine hours peak, making sightseeing and outdoor activities more enjoyable.The worst time to visit West Haven
Visits during the colder months may not be cozy. Monthly high temperatures from December to February hover in the range of 35.1°F (1.7°C) to 37.9°F (3.3°C) with lows dropping to 25.5°F (-3.6°C) in January. Moreover, the combination of cold winds and snowfall, most significantly in January and February, might add discomfort to the weather. Less sunshine and shorter days also reduce the suitability of these months for outdoor tourist activities.Spring weather in West Haven
Spring in West Haven introduces gradually warming temperatures and an increased precipitation. Between March and May, high temperatures ascend from 43.9°F (6.6°C) to 65.1°F (18.4°C), while low temperatures climb from 33.1°F (0.6°C) to 51.4°F (10.8°C). The recorded rainfall in this period sees a surge from 2.8" (71mm) in March to 2.76" (70mm) in May.Summer weather in West Haven
West Haven experiences its highest temperatures from June to August, steadily rising to a peak high of 80.4°F (26.9°C) in July and an elevated low of 67.6°F (19.8°C), providing a warm and comfortable atmosphere. Rainfall peaks to 3.43" (87mm) in July and eases to 3.15" (80mm) in August.Autumn weather in West Haven
Autumn observes a gradual decline in temperatures, with high temperatures decreasing from 72.5°F (22.5°C) in September to 50.7°F (10.4°C) in November and lows falling from 60.3°F (15.7°C) to 40.1°F (4.5°C). Despite the cooling conditions, rainfall escalates peaking with 3.54" (90mm) in October then dipping to 3.07" (78mm) by November.Winter weather in West Haven
Winter brings the coldest temperatures of the year to West Haven. High temperatures descend from 41.7°F (5.4°C) in December to 35.1°F (1.7°C) in January while lows settle around 32.5°F (0.3°C) in December and 25.5°F (-3.6°C) in January. Rainfall sees a steep increase peaking at 3.86" (98mm) in December. These months also record maximum snowfall days at 6.1 in January and 7.3 in February.Weather in January
The start of the new year brings brisk temperatures to the coastal city of West Haven. The chilliest time of the year remains January, imposing an average high and low temperature of 35.1°F (1.7°C) and 25.5°F (-3.6°C) respectively. Weather in January »Weather in February
The continuation of winter is observed in February with the city's weather scenario largely echoing that of January. A slightly upward shift in the temperature spectrum is observed, with days displaying an infinitesimal elevation in their warmth. Weather in February »Weather in March
March appears as a bridging month from winter's chill to spring's temperate climate in West Haven. With temperatures commencing a noticeable climb, the farewell to snowfall becomes apparent. Days begin to receive more sunshine hours, increasing outdoor activities after winter's confinement. Weather in March »Weather in April
The arrival of spring during April creates a favourable climate in West Haven for outdoor enthusiasts. It presents one of the highest changes in temperature ranges of the year, providing needed respite from the prolonged cold spell. Weather in April »Weather in May
May marks an important transition in West Haven's yearly weather narrative. From the moderate spring climate, the city gradually warms up and moves towards the summer's characteristic heat. The lengthening days and increasing amounts of sunshine make outdoor activities ever more enticing. Weather in May »Weather in June
June checks all the mandatory boxes as the introductory month for summer in West Haven. Relatively long daylight hours become characteristic of the month, promoting prolonged outdoor activities. Pleasantly warm temperatures coupled with a significant reduction in cloud cover mark this month's weather. Weather in June »Weather in July
July positions itself as the warmest month of the year in West Haven, with summer in full swing. The city witnesses longer days, high temperatures, and decreased rainfall contributing to the dry yet humid spell. The coastal city remains bathed in sunshine majority of the time, adding to the vibrancy of the season. Weather in July »Weather in August
August maintains the intense summer aura in West Haven, although the heat tends to drop slightly. The city enters a brief cool-down phase which prepares it for the approaching autumn. Despite the high temperatures, the city's coastal nature provides a refreshing ocean breeze. Weather in August »Weather in September
With the arrival of September, West Haven is gently ushered into the fall season. It witnesses a substantial drop in temperature, paving the way for moderate and pleasant weather. The fall hues accentuate the cityscape's visual appeal with picturesque settings becoming quite common. Weather in September »Weather in October
October solidifies autumn's grasp in West Haven with a perceptible fall in temperature as compared to the preceding months. Autumn's chill starts seeping into the air, giving early morning and late evening walks a crisp edge. The city offers a captivating blend of autumnal hues and mild weather, ideal for sightseeing. Weather in October »Weather in November
November brings with it the onset of winter in West Haven. A considerable dip in the thermometer can be observed in comparison to October's fall-friendly temperature. As the city braces itself for the forthcoming cold spell, the reduction in daylight hours is quite visible. Weather in November »Weather in December
The advent of December signals the commencement of winter season in West Haven. With a vivid shift from November's moderate climate, the weather plunges into the cold zone, accompanied by an increasing chance of snowfall. The West Haven sight transitions into a winter wonderland, with snow-capped trees and rooftops painting a picturesque scene. Weather in December »Updated: Jul 2, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The coldest period is January, when temperatures fluctuate between an average high of 35.1°F (1.7°C) and a low of 25.5°F (-3.6°C).
In West Haven, during the entire year, the rain falls for 167.2 days and collects up to 35.71" (907mm) of precipitation.
Months with snowfall are January through April, November and December.
Throughout the year, there are 23.1 snowfall days, and 9.21" (234mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The months with the highest humidity are February, May and June, with an average relative humidity of 76%.
February has the least sunshine of the year, with an average of 4.7h of sunshine.
March is the month with the most snowfall. Snow falls for 4.8 days and accumulates 2.8" (71mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The months with the lowest humidity are April and November, with an average relative humidity of 72%.
May through October are months without snowfall.
With an average of 15h and 6min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
With its average high temperature of 80.4°F (26.9°C) and a low of 67.6°F (19.8°C), July is regarded as the warmest month.
The month with the most sunshine is July, with an average of 10.6h of sunshine.
The month with the least rainfall in West Haven is September, when the rain falls for 13.4 days and typically collects 2.24" (57mm) of precipitation.
The month with the most rainfall is December, when the rain falls for 12.5 days and typically aggregates up to 3.86" (98mm) of precipitation.
The month with the shortest days in West Haven is December, with an average of 9h and 18min of daylight.
Average temperature
West Haven, CT
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.1°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure
West Haven, CT
- Average pressure in January:
30.04"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
West Haven, CT
- Average wind speed in January:
10.4mph - Average wind speed in February:
10mph - Average wind speed in March:
10.1mph - Average wind speed in April:
9.4mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.3mph - Average wind speed in November:
9.8mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
West Haven, CT
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall
West Haven, CT
- Average rainfall in January:
2.4" - Average rainfall in February:
2.4" - Average rainfall in March:
2.8" - Average rainfall in April:
3.11" - Average rainfall in May:
2.76" - Average rainfall in June:
2.95"
- Average rainfall in July:
3.43" - Average rainfall in August:
3.15" - Average rainfall in September:
2.24" - Average rainfall in October:
3.54" - Average rainfall in November:
3.07" - Average rainfall in December:
3.86"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days
West Haven, CT
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.1 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
15.1 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
18 days - Average rainfall days in August:
17.1 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
14.3 days - Average rainfall days in November:
10.8 days - Average rainfall days in December:
12.5 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
West Haven, CT
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
West Haven, CT
- Average snowfall days in January:
6.1 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
0.4 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
3.5 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
West Haven, CT
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 6min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 24min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
West Haven, CT
- Average sunshine days in January:
17 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
12.7 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
14.6 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
15.4 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is August (11.3 days).
Average UV index
West Haven, CT
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
West Haven, CT
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
West Haven, CT
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
