Portsmouth picks up around 18 more inches of snow each winter.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Durham | Metric | Portsmouth |
|---|---|---|
| 200 days | Sunny daysclear or partly cloudy skies | 202 days |
| 44 in | Precipitationper year | 45 in |
| 128 days | Wet daysrain or snow per year | 127 days |
| 40 in | Snowfallper year | 59 in |
| 12 days | Hot daysabove 90 °F | 10 days |
| 151 days | Freezing nightsat or below 32 °F | 145 days |
| 73% | Humidityaverage relative | 73% |
| 47 °F | Average temperatureyear round | 48 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Durham high | 33 | 36 | 44 | 57 | 67 | 76 | 82 | 81 | 73 | 60 | 48 | 38 |
| Portsmouth high | 33 | 36 | 44 | 56 | 66 | 75 | 81 | 80 | 72 | 60 | 48 | 38 |
| Durham low | 15 | 16 | 24 | 34 | 44 | 53 | 59 | 57 | 50 | 39 | 30 | 21 |
| Portsmouth low | 16 | 17 | 25 | 35 | 45 | 54 | 60 | 58 | 51 | 40 | 31 | 22 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Durham | 3.3 | 3.2 | 4.1 | 4.1 | 3.1 | 3.9 | 3.5 | 3.4 | 3.4 | 4.2 | 3.6 | 4.3 |
| Portsmouth | 3.6 | 3.4 | 4.5 | 4.2 | 3.3 | 3.6 | 3.1 | 3.3 | 3.4 | 4.4 | 3.8 | 4.6 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Durham | 18 | 16 | 16 | 15 | 15 | 15 | 18 | 19 | 18 | 19 | 17 | 16 |
| Portsmouth | 17 | 16 | 16 | 16 | 15 | 15 | 19 | 20 | 17 | 19 | 17 | 16 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Durham vs another city
- Durham vs Dover, NH
- Durham vs Newmarket, NH
- Durham vs Somersworth, NH
- Durham vs Kittery, ME
- Durham vs Rochester, NH
- Durham vs New York, NY
- Durham vs Los Angeles, CA
- Durham vs Chicago, IL
- Durham vs Houston, TX
- Durham vs Phoenix, AZ
- Durham vs Philadelphia, PA
Portsmouth vs another city
- Portsmouth vs Kittery, ME
- Portsmouth vs Newmarket, NH
- Portsmouth vs Hampton, NH
- Portsmouth vs Dover, NH
- Portsmouth vs Exeter, NH
- Portsmouth vs New York, NY
- Portsmouth vs Los Angeles, CA
- Portsmouth vs Chicago, IL
- Portsmouth vs Houston, TX
- Portsmouth vs Phoenix, AZ
- Portsmouth vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).