New Haven County (New Haven)
May
Weather in New Haven County, Connecticut for May 2026
Your guide to New Haven County weather in May - trends and predictions
Special Weather Statement - See hour by hour.
The forecast for the next days in New Haven County predicts temperatures to be around 16 °F, close to the historical average.
In general, the average temperature in New Haven County at the beginning of May is 17.6 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 19.6 °F by the end of May.
New Haven County in May brings notable rainfall, with an average of 18 rainy days and a total precipitation of 318.7 mm.
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Temperatures
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13
Dry days
18
Rainy days
0
Snow days
18°/11°
Temperatures
19 km/h
Avg max wind
82 %
Avg humidity
New Haven County Weather May
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Temperatures trend during May in New Haven County
See the weather trend as well as the moving average line
May weather in New Haven County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Partly cloudy | 16° /7° | 0 mm | 7 | |
| May 2 |  Overcast | 18° /9° | 4.2 mm | 4 | |
| May 3 |  Moderate or heavy rain shower | 18° /8° | 1.3 mm | 7 | |
| May 4 |  Heavy rain at times | 18° /10° | 4 mm | 7 | |
| May 5 |  Sunny | 24° /9° | 0 mm | 6.7 | |
| May 6 |  Moderate rain | 16° /13° | 16.2 mm | 0.8 | |
| May 7 | Moderate rain | 13° /9° | 11.1 mm | 2.1 | |
| May 8 | Sunny | 15° /6° | 0 mm | 0.9 | |
| May 9 |  Patchy rain possible | 16° /7° | 4.5 mm | 3 | |
| May 10 | Sunny | 16° /6° | 0 mm | 4 | |
| May 11 | Partly cloudy | 18° /10° | 0 mm | 4 | |
| May 12 | Moderate rain | 12° /10° | 6.2 mm | 3 | |
| May 13 | Patchy rain possible | 12° /9° | 0.9 mm | 3 | |
| May 14 | Partly cloudy | 14° /8° | 0 mm | 4 | |
| May 15 | Moderate rain | 14° /10° | 5.4 mm | 3 | |
| May 16 | Sunny | 20° /11° | 0 mm | 5 | |
| May 17 | Partly cloudy | 20° /8° | 0 mm | 4 | |
| May 18 | Moderate rain | 14° /10° | 6.9 mm | 3 | |
| May 19 |  Cloudy | 18° /9° | 0 mm | 4 | |
| May 20 | Partly cloudy | 15° /7° | 0 mm | 5 | |
| May 21 | Sunny | 17° /11° | 7.6 mm | 5 | |
| May 22 | Sunny | 17° /10° | 30.9 mm | 4 | |
| May 23 | Heavy rain at times | 17° /10° | 18.9 mm | 4 | |
| May 24 | Sunny | 20° /11° | 0 mm | 5 | |
| May 25 | Overcast | 20° /11° | 0 mm | 5 | |
| May 26 | Moderate rain at times | 21° /13° | 0.4 mm | 5 | |
| May 27 | Moderate or heavy rain shower | 18° /12° | 35 mm | 4 | |
| May 28 | Patchy rain possible | 20° /14° | 1.2 mm | 5 | |
| May 29 | Patchy rain possible | 20° /12° | 11.6 mm | 5 | |
| May 30 | Moderate rain at times | 18° /12° | 9 mm | 4 | |
| May 31 | Cloudy | 20° /10° | 50.4 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for New Haven County in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the New Haven County forecast closer to your planned date for the most up-to-date weather information.
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New Haven County in May - FAQ
What are the expected maximum and minimum temperatures in New Haven County during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in New Haven County during May?
Significant rainfall exceeding 318.7 mm is expected in New Haven County during May, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New Haven County during May?
The average wind speed in New Haven County during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in New Haven County
Explore the daily rainfall trends and prepare for New Haven Countys May weather 💧
Typically, New Haven County has 18 rainy days in May with a total of 318.7 mm of rainfall.
UV exposure in New Haven County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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