Climate averages 1991–2020
Nashua weather
in May.
A mild, moderately wet month: the 5th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Nashua: daytime highs average 19.3°C and nights cool to about 9.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 81 mm of rain on roughly 11 days, which makes May a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 36 min on an average May day.
The nearest other city in this atlas is Lowell (19 km away). In May its highs average 19.2°C, about as warm as Nashua, with 78 mm of rain.
Among the 498 cities listed in the United States, Nashua ranks joint 431st of 498 for the warmest May highs and joint 222nd of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Nashua is 4.5°C cooler than that mean.
From May to June, average highs rise by 5.3°C to 24.6°C, and monthly rainfall rises from 81 mm to 90 mm.
The annual picture
May in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Nashua climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.4°C-8.4°C | -8.4°C | 80 | 9.6 | 9.49 h |
| February | 2.0°C-7.5°C | -7.5°C | 76 | 8.5 | 10.511 h |
| March | 6.4°C-3.2°C | -3.2°C | 103 | 10.9 | 11.912 h |
| April | 13.3°C3.0°C | 3.0°C | 94 | 10.5 | 13.413 h |
| May, selected | 19.3°C9.1°C | 9.1°C | 81 | 10.8 | 14.615 h |
| June | 24.6°C14.7°C | 14.7°C | 90 | 10.8 | 15.315 h |
| July | 27.9°C18.0°C | 18.0°C | 86 | 10.3 | 15.015 h |
| August | 26.9°C17.3°C | 17.3°C | 85 | 9.6 | 13.914 h |
| September | 22.5°C13.4°C | 13.4°C | 86 | 8.0 | 12.513 h |
| October | 15.5°C7.2°C | 7.2°C | 97 | 9.3 | 11.111 h |
| November | 9.0°C1.5°C | 1.5°C | 86 | 9.4 | 9.810 h |
| December | 3.3°C-4.2°C | -4.2°C | 105 | 10.3 | 9.19 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Lowell in MayUnited States · 19 kmHigh 19.2°C · Low 9.3°C · 78 mm rain
- Manchester, United States in MayUnited States · 26 kmHigh 19.1°C · Low 8.7°C · 80 mm rain
- Lawrence (Massachusetts), United States in MayUnited States · 26 kmHigh 19.2°C · Low 9.4°C · 78 mm rain
- Newton in MayUnited States · 52 kmHigh 19.1°C · Low 9.6°C · 77 mm rain
- Lynn in MayUnited States · 54 kmHigh 16.7°C · Low 9.6°C · 84 mm rain
- Boston in MayUnited States · 56 kmHigh 18.8°C · Low 9.3°C · 81 mm rain
- Dorchester in MayUnited States · 61 kmHigh 18.5°C · Low 9.5°C · 81 mm rain
- Worcester, United States in MayUnited States · 62 kmHigh 19.2°C · Low 9.2°C · 82 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Nashua) is explained once on the Nashua year overview and on the Sources, method and limits page.