Johnston, Iowa, United States Climate

Weather: 10.46°C/50.83°F, Wind SW at 6.17 km/h, 75% Humidity, 0% Chance of rain

United States
(Photo by Austin Goode on Unsplash)
Contents

Johnston Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Johnston has a Humid continental, no dry season, hot summer climate (Classification: Dfa). The district’s yearly temperature is 10.64ºC (51.15ºF) and it is -2.0% lower than United States’s averages. Johnston typically receives about 22.26 millimeters (0.88 inches) of precipitation and has 35.63 rainy days (9.76% of the time) annually.

CountryUnited States
CityIowa
Longitude-93.7130493
Latitude41.6709834
Attitude/ElevationNonem (0ft)
Local timeThursday 15:07
Annual high temperature13.97ºC (57.15ºF)
Annual low temperature5.55ºC (41.99ºF)
Average annual precip.22.26mm (0.88in)
Warmest monthJuly (27.88ºC / 82.18ºF)
Coldest MonthJanuary (-9.81ºC / 14.34ºF)
Wettest MonthJune (45.45mm / 1.79in)
Driest MonthFebruary (7.66mm / 0.3in)
Number of days with rainfall (≥ 1.0 mm)35.63 days (9.76%)
Days with no rain329.37 days (90.24%)
Humidity76.4%

Climate Johnston: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)12.0(53.6)16.0(60.8)20.0(68.0)26.0(78.8)36.0(96.8)33.0(91.4)33.0(91.4)36.0(96.8)37.0(98.6)29.0(84.2)22.0(71.6)14.0(57.2)37.0(98.6)
Average high °C (°F)-2.58(27.36)-2.14(28.15)7.54(45.57)13.4(56.12)21.25(70.25)26.57(79.83)27.88(82.18)27.17(80.91)24.24(75.63)14.24(57.63)7.07(44.73)2.98(37.36)13.97(57.15)
Daily mean °C (°F)-5.52(22.06)-4.95(23.09)4.19(39.54)9.66(49.39)17.94(64.29)23.38(74.08)24.74(76.53)23.35(74.03)20.39(68.7)10.63(51.13)3.87(38.97)-0.01(31.98)10.64(51.15)
Average low °C (°F)-9.81(14.34)-9.22(15.4)-0.3(31.46)3.89(39.0)12.26(54.07)17.67(63.81)18.87(65.97)17.0(62.6)14.29(57.72)5.68(42.22)-0.36(31.35)-3.4(25.88)5.55(41.99)
Record low °C (°F)-29.0(-20.2)-23.0(-9.4)-21.0(-5.8)-10.0(14.0)2.0(35.6)9.0(48.2)12.0(53.6)11.0(51.8)0.0(0)-5.0(23.0)-18.0(-0.4)-14.0(6.8)-29.0(-20.2)
Average precipitation mm (inches)9.23(0.36)7.66(0.3)15.31(0.6)15.5(0.61)42.72(1.68)45.45(1.79)29.57(1.16)26.25(1.03)34.31(1.35)19.47(0.77)11.24(0.44)10.44(0.41)22.26(0.88)
Average precipitation days (≥ 1.0 mm)2.02.02.182.734.824.824.363.453.912.361.731.272.97
Average relative humidity (%)81.4379.9272.9168.6277.9280.8283.9480.5177.4167.9970.4774.8476.4
Mean monthly sunshine hours7.338.119.169.7911.5113.3212.9110.6310.459.517.547.019.77

Climate Graph

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

Johnston

Johnston Temperature by Month

July
24.74°C | 76.53°F
June
23.38°C | 74.08°F
August
23.35°C | 74.03°F
September
20.39°C | 68.7°F
May
17.94°C | 64.29°F
October
10.63°C | 51.13°F
April
9.66°C | 49.39°F
March
4.19°C | 39.54°F
November
3.87°C | 38.97°F
December
-0.01°C | 31.98°F
February
-4.95°C | 23.09°F
January
-5.52°C | 22.06°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature14.0°C (57.2°F)3.67°C (38.61°F)-5.0°C (23.0°F)
Avg Temperature11.0°C (51.8°F)0.9°C (33.62°F)-7.0°C (19.4°F)
Min Temperature7.0°C (44.6°F)-2.57°C (27.37°F)-10.0°C (14.0°F)
Dew PointMaxAverageMin
Dew Point5.0°C (41.0°F)-4.6°C (23.72°F)-15.0°C (5.0°F)
PrecipitationMaxAverageMinSum
Precipitation17.1mm | 0.67in1.62mm | 0.06in0.0mm | 0in48.5mm | 1.91in
Snowdepth2.5mm | 0.1in0.19mm | 0.01in0.0mm | 0in5.6mm | 0.22in
WindMaxAverageMin
Wind28.0kmh | 17.4mph14.53kmh | 9.03mph4.0kmh | 2.49mph
Gust Wind38.0kmh | 23.61mph21.67kmh | 13.47mph5.0kmh | 3.11mph
Sea Level PressureMaxAverageMin
Sea Level Pressure17.1mb1.62mb0.0mb
Johnston

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
November° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-11-0111 | 51.80 | 32.0535 | 3.1129.88 | 10120.0 | 0.0
2018-11-029 | 48.23 | 37.4689 | 5.5929.83 | 10101.0 | 0.04
2018-11-036 | 42.85 | 41.08915 | 9.3229.94 | 101417.1 | 0.67
2018-11-047 | 44.64 | 39.28616 | 9.9429.85 | 10113.5 | 0.14
2018-11-057 | 44.64 | 39.28816 | 9.9429.74 | 10074.6 | 0.18
2018-11-065 | 41.0-1 | 30.26725 | 15.5329.88 | 10120.0 | 0.0
2018-11-071 | 33.8-7 | 19.46016 | 9.9430.27 | 10250.0 | 0.0
2018-11-080 | 32.0-6 | 21.2654 | 2.4930.42 | 10300.4 | 0.02
2018-11-09-4 | 24.8-10 | 14.06419 | 11.8130.39 | 10290.7 | 0.03
2018-11-10-5 | 23.0-12 | 10.45913 | 8.0830.39 | 10290.0 | 0.0
2018-11-110 | 32.0-6 | 21.27112 | 7.4630.27 | 10250.0 | 0.0
2018-11-12-4 | 24.8-11 | 12.25917 | 10.5630.53 | 10340.0 | 0.0
2018-11-13-4 | 24.8-15 | 5.04710 | 6.2130.56 | 10350.0 | 0.0
2018-11-140 | 32.0-11 | 12.24714 | 8.730.47 | 10320.0 | 0.0
2018-11-152 | 35.6-7 | 19.45816 | 9.9430.06 | 10180.0 | 0.0
2018-11-163 | 37.4-1 | 30.27712 | 7.4630.06 | 10180.3 | 0.01
2018-11-17-2 | 28.4-3 | 26.68720 | 12.4330.33 | 10275.8 | 0.23
2018-11-18-4 | 24.8-11 | 12.26512 | 7.4630.39 | 10290.2 | 0.01
2018-11-19-1 | 30.2-7 | 19.46916 | 9.9430.18 | 10220.0 | 0.0
2018-11-20-2 | 28.4-7 | 19.47213 | 8.0830.3 | 10260.0 | 0.0
2018-11-212 | 35.6-1 | 30.28513 | 8.0830.27 | 10250.0 | 0.0
2018-11-226 | 42.82 | 35.68415 | 9.3230.12 | 10200.0 | 0.0
2018-11-237 | 44.64 | 39.28222 | 13.6729.71 | 10064.5 | 0.18
2018-11-247 | 44.62 | 35.67315 | 9.3229.65 | 10040.2 | 0.01
2018-11-25-2 | 28.4-5 | 23.07728 | 17.429.94 | 10148.0 | 0.31
2018-11-26-6 | 21.2-13 | 8.66021 | 13.0530.18 | 10220.0 | 0.0
2018-11-27-7 | 19.4-14 | 6.85914 | 8.730.21 | 10230.0 | 0.0
2018-11-28-5 | 23.0-9 | 15.87514 | 8.730.0 | 10160.0 | 0.0
2018-11-29-1 | 30.2-4 | 24.8875 | 3.1129.88 | 10121.5 | 0.06
2018-11-301 | 33.8-1 | 30.2919 | 5.5929.97 | 10150.7 | 0.03

Johnston 3 Year Historical Weather Data

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