Climate averages 1991–2020
Lynn weather
in May.
A mild, moderately wet month: the 5th warmest and the joint 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Lynn: daytime highs average 16.7°C and nights cool to about 9.6°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 84 mm of rain on roughly 11 days, which makes May a moderately wet month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 35 min on an average May day.
The nearest other city in this atlas is Boston (15 km away). In May its highs average 18.8°C, 2.2°C warmer than Lynn, with 81 mm of rain.
Among the 498 cities listed in the United States, Lynn ranks joint 487th of 498 for the warmest May highs and joint 238th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Lynn is 7.1°C cooler than that mean.
From May to June, average highs rise by 5.1°C to 21.8°C, and monthly rainfall rises from 84 mm to 88 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
Lynn climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.6°C-5.4°C | -5.4°C | 92 | 10.0 | 9.59 h |
| February | 2.7°C-4.8°C | -4.8°C | 84 | 9.1 | 10.511 h |
| March | 5.9°C-1.3°C | -1.3°C | 115 | 11.3 | 11.912 h |
| April | 11.4°C4.2°C | 4.2°C | 103 | 10.7 | 13.313 h |
| May, selected | 16.7°C9.6°C | 9.6°C | 84 | 10.7 | 14.615 h |
| June | 21.8°C15.0°C | 15.0°C | 88 | 10.3 | 15.215 h |
| July | 25.2°C18.6°C | 18.6°C | 74 | 9.9 | 15.015 h |
| August | 24.6°C18.3°C | 18.3°C | 85 | 9.0 | 13.914 h |
| September | 21.0°C14.8°C | 14.8°C | 87 | 8.2 | 12.513 h |
| October | 15.2°C9.1°C | 9.1°C | 109 | 10.1 | 11.111 h |
| November | 9.6°C3.6°C | 3.6°C | 96 | 9.6 | 9.810 h |
| December | 4.6°C-1.5°C | -1.5°C | 116 | 10.6 | 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
- Boston in MayUnited States · 15 kmHigh 18.8°C · Low 9.3°C · 81 mm rain
- Dorchester in MayUnited States · 21 kmHigh 18.5°C · Low 9.5°C · 81 mm rain
- Quincy in MayUnited States · 24 kmHigh 18.0°C · Low 9.7°C · 81 mm rain
- Newton in MayUnited States · 26 kmHigh 19.1°C · Low 9.6°C · 77 mm rain
- Lawrence (Massachusetts), United States in MayUnited States · 32 kmHigh 19.2°C · Low 9.4°C · 78 mm rain
- Lowell in MayUnited States · 35 kmHigh 19.2°C · Low 9.3°C · 78 mm rain
- Brockton in MayUnited States · 43 kmHigh 18.4°C · Low 9.7°C · 77 mm rain
- Nashua in MayUnited States · 54 kmHigh 19.3°C · Low 9.1°C · 81 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 Lynn) is explained once on the Lynn year overview and on the Sources, method and limits page.