Potomac, Maryland, United States Climate

Weather: 21.1°C/69.98°F, Wind SW at 5.14 km/h, 41% Humidity, 0% Chance of rain

United States
(Photo by Sid Ramirez on Unsplash)
Contents

Potomac Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Potomac has a Humid subtropical, no dry season climate (Classification: Cfa). The district’s yearly temperature is 15.61ºC (60.1ºF) and it is 2.97% higher than United States’s averages. Potomac typically receives about 47.36 millimeters (1.86 inches) of precipitation and has 46.19 rainy days (12.65% of the time) annually.

CountryUnited States
CityMaryland
Longitude-77.2085914
Latitude39.0181651
Attitude/ElevationNonem (0ft)
Local timeThursday 18:37
Annual high temperature18.59ºC (65.46ºF)
Annual low temperature11.01ºC (51.82ºF)
Average annual precip.47.36mm (1.86in)
Warmest monthJuly (32.1ºC / 89.78ºF)
Coldest MonthJanuary (-1.14ºC / 29.95ºF)
Wettest MonthAugust (73.3mm / 2.89in)
Driest MonthJanuary (27.45mm / 1.08in)
Number of days with rainfall (≥ 1.0 mm)46.19 days (12.65%)
Days with no rain318.81 days (87.35%)
Humidity64.84%

Climate Potomac: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)18.0(64.4)25.0(77.0)24.0(75.2)28.0(82.4)34.0(93.2)38.0(100.4)39.0(102.2)37.0(98.6)37.0(98.6)34.0(93.2)24.0(75.2)16.0(60.8)39.0(102.2)
Average high °C (°F)4.97(40.95)8.67(47.61)11.31(52.36)17.39(63.3)24.42(75.96)28.6(83.48)32.1(89.78)30.41(86.74)26.59(79.86)20.04(68.07)11.48(52.66)7.08(44.74)18.59(65.46)
Daily mean °C (°F)2.58(36.64)5.73(42.31)8.06(46.51)13.92(57.06)20.96(69.73)25.28(77.5)28.85(83.93)27.42(81.36)23.49(74.28)17.13(62.83)8.91(48.04)4.99(40.98)15.61(60.1)
Average low °C (°F)-1.14(29.95)1.65(34.97)3.42(38.16)8.52(47.34)15.58(60.04)19.76(67.57)23.25(73.85)22.48(72.46)19.1(66.38)12.67(54.81)5.06(41.11)1.77(35.19)11.01(51.82)
Record low °C (°F)-15.0(5.0)-12.0(10.4)-7.0(19.4)-1.0(30.2)3.0(37.4)11.0(51.8)18.0(64.4)17.0(62.6)10.0(50.0)4.0(39.2)-4.0(24.8)-7.0(19.4)-15.0(5.0)
Average precipitation mm (inches)27.45(1.08)41.83(1.65)36.99(1.46)36.15(1.42)58.74(2.31)51.2(2.02)58.62(2.31)73.3(2.89)51.58(2.03)47.83(1.88)38.67(1.52)45.95(1.81)47.36(1.86)
Average precipitation days (≥ 1.0 mm)2.453.733.364.05.04.554.735.914.912.732.092.733.85
Average relative humidity (%)64.8666.7860.259.8866.3762.1661.5265.6268.8967.3864.0670.3164.84
Mean monthly sunshine hours8.218.749.49.6411.7813.1912.810.449.869.657.786.69.84

Climate Graph

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

Potomac

Potomac Temperature by Month

July
28.85°C | 83.93°F
August
27.42°C | 81.36°F
June
25.28°C | 77.5°F
September
23.49°C | 74.28°F
May
20.96°C | 69.73°F
October
17.13°C | 62.83°F
April
13.92°C | 57.06°F
November
8.91°C | 48.04°F
March
8.06°C | 46.51°F
February
5.73°C | 42.31°F
December
4.99°C | 40.98°F
January
2.58°C | 36.64°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature37.0°C (98.6°F)27.13°C (80.83°F)17.0°C (62.6°F)
Avg Temperature33.0°C (91.4°F)24.37°C (75.87°F)16.0°C (60.8°F)
Min Temperature27.0°C (80.6°F)20.43°C (68.77°F)14.0°C (57.2°F)
Dew PointMaxAverageMin
Dew Point22.0°C (71.6°F)18.43°C (65.17°F)12.0°C (53.6°F)
PrecipitationMaxAverageMinSum
Precipitation38.7mm | 1.52in13.25mm | 0.52in0.0mm | 0in397.5mm | 15.65in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind17.0kmh | 10.56mph8.93kmh | 5.55mph3.0kmh | 1.86mph
Gust Wind25.0kmh | 15.53mph12.8kmh | 7.95mph4.0kmh | 2.49mph
Sea Level PressureMaxAverageMin
Sea Level Pressure38.7mb13.25mb0.0mb
Potomac

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-09-0126 | 78.822 | 71.6798 | 4.9730.21 | 102320.7 | 0.81
2018-09-0231 | 87.821 | 69.8673 | 1.8630.21 | 10235.2 | 0.2
2018-09-0332 | 89.622 | 71.6653 | 1.8630.24 | 102418.8 | 0.74
2018-09-0432 | 89.622 | 71.6633 | 1.8630.21 | 102324.0 | 0.94
2018-09-0532 | 89.622 | 71.6624 | 2.4930.18 | 10225.1 | 0.2
2018-09-0633 | 91.422 | 71.6605 | 3.1130.12 | 10202.6 | 0.1
2018-09-0729 | 84.221 | 69.8706 | 3.7330.09 | 101938.7 | 1.52
2018-09-0819 | 66.216 | 60.88013 | 8.0830.09 | 101932.9 | 1.3
2018-09-0917 | 62.614 | 57.28617 | 10.5630.09 | 101936.0 | 1.42
2018-09-1021 | 69.818 | 64.48711 | 6.8430.03 | 10171.5 | 0.06
2018-09-1123 | 73.419 | 66.2847 | 4.3530.09 | 10196.8 | 0.27
2018-09-1225 | 77.020 | 68.0824 | 2.4930.18 | 102229.7 | 1.17
2018-09-1324 | 75.221 | 69.88610 | 6.2130.15 | 10215.1 | 0.2
2018-09-1423 | 73.420 | 68.08613 | 8.0830.15 | 10212.8 | 0.11
2018-09-1525 | 77.019 | 66.27611 | 6.8430.15 | 10213.4 | 0.13
2018-09-1625 | 77.019 | 66.27610 | 6.2130.15 | 10211.3 | 0.05
2018-09-1724 | 75.221 | 69.88614 | 8.729.97 | 101531.5 | 1.24
2018-09-1825 | 77.021 | 69.88012 | 7.4629.8 | 100924.9 | 0.98
2018-09-1927 | 80.619 | 66.26910 | 6.2129.91 | 10130.1 | 0.0
2018-09-2026 | 78.819 | 66.2708 | 4.9730.15 | 10210.6 | 0.02
2018-09-2124 | 75.218 | 64.47315 | 9.3230.12 | 10200.1 | 0.0
2018-09-2223 | 73.415 | 59.06712 | 7.4630.12 | 10203.4 | 0.13
2018-09-2316 | 60.813 | 55.4808 | 4.9730.21 | 102332.3 | 1.27
2018-09-2418 | 64.416 | 60.88813 | 8.0830.33 | 102712.6 | 0.5
2018-09-2523 | 73.420 | 68.0898 | 4.9730.21 | 102311.4 | 0.45
2018-09-2626 | 78.820 | 68.0799 | 5.5930.0 | 101627.3 | 1.07
2018-09-2717 | 62.613 | 55.4759 | 5.5930.09 | 101914.7 | 0.58
2018-09-2821 | 69.814 | 57.2727 | 4.3530.06 | 10184.0 | 0.16
2018-09-2922 | 71.614 | 57.2688 | 4.9730.21 | 10230.0 | 0.0
2018-09-3022 | 71.612 | 53.6597 | 4.3530.3 | 10260.0 | 0.0

Potomac 3 Year Historical Weather Data

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