Waterbury weather by month
Average highs run from 37°F in January to 84°F in July, and January nights average 19°F. It gets 45 inches of rain and melted snow a year and 39 inches of snow. Nights drop below freezing about 129 times a year. The most comfortable months are May to September.
Best time to visit Waterbury
For comfortable weather, go in May to September. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 37°F | 19°F | 3.1 in | 11.1 in | 5 | 0 | 28 | cold |
| February | 39°F | 20°F | 2.9 in | 11.8 in | 5 | 0 | 25 | cold |
| March | 48°F | 28°F | 4.1 in | 5.5 in | 6 | 0 | 21 | cold |
| April | 60°F | 38°F | 4.1 in | 0.5 in | 7 | 0 | 8 | cool |
| May | 70°F | 48°F | 3.5 in | 0.0 in | 7 | 1 | 1 | mild |
| June | 79°F | 57°F | 4.1 in | 0.0 in | 7 | 2 | 0 | warm |
| July | 84°F | 63°F | 3.4 in | 0.0 in | 6 | 7 | 0 | warm |
| August | 82°F | 61°F | 3.5 in | 0.0 in | 6 | 4 | 0 | warm |
| September | 75°F | 54°F | 4.3 in | 0.0 in | 5 | 1 | 0 | mild |
| October | 64°F | 42°F | 4.5 in | 0.6 in | 6 | 0 | 5 | mild days, chilly nights |
| November | 52°F | 32°F | 3.4 in | 0.8 in | 6 | 0 | 16 | cool |
| December | 42°F | 25°F | 4.1 in | 8.3 in | 7 | 0 | 26 | cold |
| Year | 61°F avg | 40°F avg | 44.9 in | 38.6 in | 74 | 15 | 129 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Meriden Markham Municipal Airport, CT (USW00054788), 12 miles from the city center; snowfall from Burlington, CT. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Waterbury
The shortest day is December 21, with 9h 09m of daylight; the longest is June 21, with 15h 11m. The earliest sunset comes around December 5 (4:21 pm) and the latest around June 25 (8:30 pm). The sun sets after 8 pm on 90 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:16 am | 4:46 pm | 9h 30m |
| February | 6:47 am | 5:25 pm | 10h 38m |
| March | 7:04 am | 6:58 pm | 11h 55m |
| April | 6:12 am | 7:32 pm | 13h 20m |
| May | 5:33 am | 8:04 pm | 14h 31m |
| June | 5:17 am | 8:27 pm | 15h 10m |
| July | 5:31 am | 8:24 pm | 14h 53m |
| August | 6:01 am | 7:51 pm | 13h 50m |
| September | 6:32 am | 7:01 pm | 12h 28m |
| October | 7:04 am | 6:10 pm | 11h 06m |
| November | 6:41 am | 4:31 pm | 9h 50m |
| December | 7:12 am | 4:22 pm | 9h 11m |
Calculated for 2026 at the center of Waterbury with NOAA's solar equations, in local clock time (Eastern Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Waterbury getting warmer?
The last 10 years averaged 3.1°F warmer than the 20th century. See the climate stripes for Waterbury.Frequently asked questions
What is the warmest month in Waterbury?
July is the warmest month, with an average high of 84°F and an average low of 63°F (NOAA 1991-2020 normals).
What is the coldest month in Waterbury?
January is the coldest, with average lows of 19°F and highs of 37°F.
What is the rainiest month in Waterbury?
October gets the most precipitation, 4.5 inches on average. February is the driest at 2.9 inches.
Does it snow in Waterbury?
Yes. Waterbury averages 39 inches of snow a year.
When is the best time to visit Waterbury?
For comfortable weather, May to September. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Waterbury?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Waterbury profile.
Compare the weather: Waterbury vs New Britain, Waterbury vs New Haven, Waterbury vs Danbury, Waterbury vs Hartford.