Norristown, Pennsylvania, United States Climate

Weather: 2.49°C/36.48°F, Wind SW at 2.06 km/h, 51% Humidity, 0% Chance of rain

United States
(Photo by Donnie Rosie on Unsplash)

Norristown Climate Summary

Located at an elevation of 47.0 meters (154.2 feet) above sea level, Norristown has a Humid subtropical, no dry season climate (Classification: Cfa). The district’s yearly temperature is 14.66ºC (58.39ºF) and it is 2.02% higher than United States’s averages. Norristown typically receives about 31.16 millimeters (1.23 inches) of precipitation and has 42.55 rainy days (11.66% of the time) annually.

CountryUnited States
CityPennsylvania
Longitude-75.3399048
Latitude40.121497
Attitude/Elevation47.0m (154.2ft)
Local timeSaturday 22:33
Annual high temperature17.51ºC (63.52ºF)
Annual low temperature10.02ºC (50.04ºF)
Average annual precip.31.16mm (1.23in)
Warmest monthJuly (31.96ºC / 89.53ºF)
Coldest MonthJanuary (-2.42ºC / 27.64ºF)
Wettest MonthAugust (55.45mm / 2.18in)
Driest MonthJanuary (21.09mm / 0.83in)
Number of days with rainfall (≥ 1.0 mm)42.55 days (11.66%)
Days with no rain322.45 days (88.34%)
Humidity65.59%

Climate Norristown: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)16.0(60.8)23.0(73.4)22.0(71.6)28.0(82.4)33.0(91.4)38.0(100.4)40.0(104.0)36.0(96.8)37.0(98.6)32.0(89.6)24.0(75.2)15.0(59.0)40.0(104.0)
Average high °C (°F)3.53(38.35)6.74(44.13)9.59(49.26)15.46(59.83)22.71(72.88)27.77(81.99)31.96(89.53)29.92(85.86)26.31(79.36)19.23(66.61)10.9(51.62)6.0(42.8)17.51(63.52)
Daily mean °C (°F)1.19(34.14)4.19(39.54)6.58(43.84)12.3(54.14)19.46(67.03)24.64(76.35)28.84(83.91)26.99(80.58)23.13(73.63)16.35(61.43)8.31(46.96)3.96(39.13)14.66(58.39)
Average low °C (°F)-2.42(27.64)0.14(32.25)2.1(35.78)7.2(44.96)13.63(56.53)18.76(65.77)22.94(73.29)22.08(71.74)18.57(65.43)11.97(53.55)4.52(40.14)0.72(33.3)10.02(50.04)
Record low °C (°F)-18.0(-0.4)-15.0(5.0)-10.0(14.0)-1.0(30.2)3.0(37.4)11.0(51.8)17.0(62.6)17.0(62.6)9.0(48.2)2.0(35.6)-6.0(21.2)-9.0(15.8)-18.0(-0.4)
Average precipitation mm (inches)21.09(0.83)25.57(1.01)24.44(0.96)24.98(0.98)38.77(1.53)34.66(1.36)40.49(1.59)55.45(2.18)30.24(1.19)24.7(0.97)22.34(0.88)31.15(1.23)31.16(1.23)
Average precipitation days (≥ 1.0 mm)2.093.453.03.454.734.274.645.643.552.642.272.823.55
Average relative humidity (%)66.8268.5864.2861.3165.762.4661.7365.5666.5367.7664.6771.765.59
Mean monthly sunshine hours7.348.439.429.4212.3213.1413.5810.489.989.267.166.289.73

Climate Graph

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

Norristown

Norristown Temperature by Month

July
28.84°C | 83.91°F
August
26.99°C | 80.58°F
June
24.64°C | 76.35°F
September
23.13°C | 73.63°F
May
19.46°C | 67.03°F
October
16.35°C | 61.43°F
April
12.3°C | 54.14°F
November
8.31°C | 46.96°F
March
6.58°C | 43.84°F
February
4.19°C | 39.54°F
December
3.96°C | 39.13°F
January
1.19°C | 34.14°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature19.0°C (66.2°F)7.52°C (45.54°F)0.0°C (0°F)
Avg Temperature14.0°C (57.2°F)4.61°C (40.3°F)-0.0°C (0°F)
Min Temperature7.0°C (44.6°F)0.16°C (32.29°F)-3.0°C (26.6°F)
Dew PointMaxAverageMin
Dew Point9.0°C (48.2°F)-2.45°C (27.59°F)-9.0°C (15.8°F)
PrecipitationMaxAverageMinSum
Precipitation29.8mm | 1.17in3.16mm | 0.12in0.0mm | 0in98.0mm | 3.86in
Snowdepth15.6mm | 0.61in1.38mm | 0.05in0.0mm | 0in42.8mm | 1.69in
WindMaxAverageMin
Wind29.0kmh | 18.02mph14.06kmh | 8.74mph5.0kmh | 3.11mph
Gust Wind41.0kmh | 25.48mph19.77kmh | 12.28mph6.0kmh | 3.73mph
Sea Level PressureMaxAverageMin
Sea Level Pressure29.8mb3.16mb0.0mb
Norristown

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
March° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-03-0111 | 51.86 | 42.8768 | 4.9729.77 | 10088.4 | 0.33
2018-03-024 | 39.21 | 33.88229 | 18.0229.53 | 100029.8 | 1.17
2018-03-035 | 41.0-2 | 28.46926 | 16.1630.03 | 10170.1 | 0.0
2018-03-044 | 39.2-5 | 23.05821 | 13.0530.18 | 10220.0 | 0.0
2018-03-053 | 37.4-6 | 21.25617 | 10.5630.12 | 10200.0 | 0.0
2018-03-066 | 42.8-3 | 26.6609 | 5.5930.03 | 10170.6 | 0.02
2018-03-071 | 33.81 | 33.89415 | 9.3229.74 | 100720.8 | 0.82
2018-03-08-0 | 32.0-3 | 26.68413 | 8.0829.8 | 10090.2 | 0.01
2018-03-092 | 35.6-5 | 23.06519 | 11.8129.83 | 10100.3 | 0.01
2018-03-103 | 37.4-6 | 21.25814 | 8.730.0 | 10160.0 | 0.0
2018-03-114 | 39.2-4 | 24.8598 | 4.9730.12 | 10200.0 | 0.0
2018-03-123 | 37.4-2 | 28.47312 | 7.4629.94 | 10141.7 | 0.07
2018-03-132 | 35.6-3 | 26.67118 | 11.1829.77 | 10081.3 | 0.05
2018-03-141 | 33.8-6 | 21.26123 | 14.2929.71 | 10060.8 | 0.03
2018-03-154 | 39.2-6 | 21.25617 | 10.5629.68 | 10050.3 | 0.01
2018-03-162 | 35.6-8 | 17.65119 | 11.8129.85 | 10110.0 | 0.0
2018-03-174 | 39.2-9 | 15.84514 | 8.729.91 | 10130.0 | 0.0
2018-03-185 | 41.0-7 | 19.4499 | 5.5929.94 | 10140.0 | 0.0
2018-03-197 | 44.6-5 | 23.0489 | 5.5929.94 | 10140.0 | 0.0
2018-03-201 | 33.8-6 | 21.26315 | 9.3229.88 | 10125.0 | 0.2
2018-03-21-0 | 32.0-1 | 30.29217 | 10.5629.71 | 100618.3 | 0.72
2018-03-221 | 33.8-0 | 32.09214 | 8.729.91 | 10130.3 | 0.01
2018-03-234 | 39.2-2 | 28.47113 | 8.0830.09 | 10191.0 | 0.04
2018-03-245 | 41.0-3 | 26.66612 | 7.4630.15 | 10210.2 | 0.01
2018-03-253 | 37.4-3 | 26.66912 | 7.4630.39 | 10291.6 | 0.06
2018-03-266 | 42.8-4 | 24.8569 | 5.5930.68 | 10390.0 | 0.0
2018-03-276 | 42.8-4 | 24.8586 | 3.7330.47 | 10320.9 | 0.04
2018-03-288 | 46.44 | 39.2805 | 3.1130.09 | 10192.2 | 0.09
2018-03-2914 | 57.29 | 48.2846 | 3.7329.94 | 10140.7 | 0.03
2018-03-3013 | 55.49 | 48.27515 | 9.3229.83 | 10103.5 | 0.14
2018-03-3111 | 51.8-3 | 26.64512 | 7.4630.21 | 10230.0 | 0.0

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