Portsmouth, New Hampshire, United States Climate

Weather: 8.24°C/46.83°F, Wind SW at 1.54 km/h, 76% Humidity, 0% Chance of rain

United States
(Photo by Brian Yurasits on Unsplash)
Contents

Portsmouth Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Portsmouth has a Humid continental, no dry season, warm summer climate (Classification: Dfb). The district’s yearly temperature is 10.5ºC (50.9ºF) and it is -2.14% lower than United States’s averages. Portsmouth typically receives about 34.86 millimeters (1.37 inches) of precipitation and has 39.82 rainy days (10.91% of the time) annually.

CountryUnited States
CityNew Hampshire
Longitude-70.7625532
Latitude43.0717552
Attitude/ElevationNonem (0ft)
Local timeFriday 15:10
Annual high temperature13.08ºC (55.54ºF)
Annual low temperature5.75ºC (42.35ºF)
Average annual precip.34.86mm (1.37in)
Warmest monthJuly (27.0ºC / 80.6ºF)
Coldest MonthJanuary (-5.81ºC / 21.54ºF)
Wettest MonthNovember (44.26mm / 1.74in)
Driest MonthSeptember (22.1mm / 0.87in)
Number of days with rainfall (≥ 1.0 mm)39.82 days (10.91%)
Days with no rain325.18 days (89.09%)
Humidity74.31%

Climate Portsmouth: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)16.0(60.8)19.0(66.2)17.0(62.6)20.0(68.0)28.0(82.4)31.0(87.8)33.0(91.4)33.0(91.4)32.0(89.6)26.0(78.8)20.0(68.0)14.0(57.2)33.0(91.4)
Average high °C (°F)0.57(33.03)2.59(36.66)5.15(41.27)9.79(49.62)17.01(62.62)22.23(72.01)27.0(80.6)25.86(78.55)21.7(71.06)14.49(58.08)7.47(45.45)3.1(37.58)13.08(55.54)
Daily mean °C (°F)-1.68(28.98)0.19(32.34)2.73(36.91)7.34(45.21)14.19(57.54)19.61(67.3)24.11(75.4)22.82(73.08)18.67(65.61)11.92(53.46)5.08(41.14)0.98(33.76)10.5(50.9)
Average low °C (°F)-5.81(21.54)-4.14(24.55)-1.42(29.44)2.74(36.93)8.65(47.57)13.56(56.41)18.27(64.89)17.33(63.19)13.6(56.48)7.8(46.04)1.03(33.85)-2.66(27.21)5.75(42.35)
Record low °C (°F)-20.0(-4.0)-15.0(5.0)-12.0(10.4)-4.0(24.8)2.0(35.6)7.0(44.6)13.0(55.4)11.0(51.8)5.0(41.0)-1.0(30.2)-14.0(6.8)-11.0(12.2)-20.0(-4.0)
Average precipitation mm (inches)33.9(1.33)33.15(1.31)35.94(1.41)40.37(1.59)29.05(1.14)32.86(1.29)31.79(1.25)37.35(1.47)22.1(0.87)33.55(1.32)44.26(1.74)43.99(1.73)34.86(1.37)
Average precipitation days (≥ 1.0 mm)2.733.093.554.273.183.363.643.642.184.183.362.643.32
Average relative humidity (%)73.7574.3473.9872.3673.3774.3474.8375.3374.3276.3374.9973.8274.31
Mean monthly sunshine hours6.568.398.8210.1912.6613.0913.612.8210.447.96.456.799.81

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Portsmouth in recent years.

Portsmouth

Portsmouth Temperature by Month

July
24.11°C | 75.4°F
August
22.82°C | 73.08°F
June
19.61°C | 67.3°F
September
18.67°C | 65.61°F
May
14.19°C | 57.54°F
October
11.92°C | 53.46°F
April
7.34°C | 45.21°F
November
5.08°C | 41.14°F
March
2.73°C | 36.91°F
December
0.98°C | 33.76°F
February
0.19°C | 32.34°F
January
-1.68°C | 28.98°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature32.0°C (89.6°F)22.33°C (72.19°F)13.0°C (55.4°F)
Avg Temperature27.0°C (80.6°F)19.47°C (67.05°F)11.0°C (51.8°F)
Min Temperature21.0°C (69.8°F)15.07°C (59.13°F)9.0°C (48.2°F)
Dew PointMaxAverageMin
Dew Point21.0°C (69.8°F)13.97°C (57.15°F)4.0°C (39.2°F)
PrecipitationMaxAverageMinSum
Precipitation76.3mm | 3.0in5.35mm | 0.21in0.0mm | 0in160.6mm | 6.32in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind19.0kmh | 11.81mph10.77kmh | 6.69mph5.0kmh | 3.11mph
Gust Wind31.0kmh | 19.26mph16.77kmh | 10.42mph7.0kmh | 4.35mph
Sea Level PressureMaxAverageMin
Sea Level Pressure76.3mb5.35mb0.0mb
Portsmouth

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-09-0120 | 68.013 | 55.4738 | 4.9730.33 | 10270.0 | 0.0
2018-09-0223 | 73.416 | 60.87611 | 6.8430.24 | 10240.0 | 0.0
2018-09-0327 | 80.621 | 69.87910 | 6.2130.15 | 10212.4 | 0.09
2018-09-0425 | 77.020 | 68.0819 | 5.5930.18 | 10220.0 | 0.0
2018-09-0526 | 78.820 | 68.0799 | 5.5930.18 | 10220.0 | 0.0
2018-09-0627 | 80.621 | 69.87911 | 6.8430.06 | 10184.0 | 0.16
2018-09-0720 | 68.013 | 55.46811 | 6.8430.15 | 10210.0 | 0.0
2018-09-0818 | 64.410 | 50.0639 | 5.5930.15 | 10210.0 | 0.0
2018-09-0914 | 57.25 | 41.05615 | 9.3230.3 | 10260.0 | 0.0
2018-09-1016 | 60.811 | 51.87519 | 11.8130.36 | 10288.0 | 0.31
2018-09-1122 | 71.618 | 64.4878 | 4.9730.15 | 102133.3 | 1.31
2018-09-1218 | 64.417 | 62.6947 | 4.3530.27 | 102513.2 | 0.52
2018-09-1321 | 69.817 | 62.6885 | 3.1130.27 | 10251.6 | 0.06
2018-09-1421 | 69.817 | 62.6865 | 3.1130.24 | 10240.0 | 0.0
2018-09-1521 | 69.817 | 62.6856 | 3.7330.18 | 10220.0 | 0.0
2018-09-1624 | 75.218 | 64.4816 | 3.7330.18 | 10220.0 | 0.0
2018-09-1724 | 75.218 | 64.47712 | 7.4630.06 | 10180.0 | 0.0
2018-09-1820 | 68.019 | 66.2958 | 4.9729.8 | 100976.3 | 3.0
2018-09-1916 | 60.813 | 55.48314 | 8.729.94 | 10140.5 | 0.02
2018-09-2015 | 59.011 | 51.88111 | 6.8430.24 | 10240.1 | 0.0
2018-09-2118 | 64.412 | 53.67715 | 9.3230.15 | 10210.0 | 0.0
2018-09-2218 | 64.411 | 51.86415 | 9.3230.06 | 10180.4 | 0.02
2018-09-2317 | 62.67 | 44.6616 | 3.7330.24 | 10240.0 | 0.0
2018-09-2411 | 51.84 | 39.26118 | 11.1830.53 | 10340.0 | 0.0
2018-09-2515 | 59.011 | 51.88217 | 10.5630.45 | 10318.0 | 0.31
2018-09-2623 | 73.420 | 68.08918 | 11.1829.94 | 101412.2 | 0.48
2018-09-2717 | 62.611 | 51.87311 | 6.8430.09 | 10190.0 | 0.0
2018-09-2814 | 57.210 | 50.0819 | 5.5930.09 | 10190.6 | 0.02
2018-09-2917 | 62.610 | 50.07311 | 6.8430.15 | 10210.0 | 0.0
2018-09-3016 | 60.88 | 46.4679 | 5.5930.27 | 10250.0 | 0.0

Portsmouth 3 Year Historical Weather Data

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