Affton, Missouri, United States Climate

Weather: 23°C/73.4°F, Wind SW at 0.89 km/h, 45% Humidity, 0% Chance of rain

Affton Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Affton has a Humid subtropical, no dry season climate (Classification: Cfa). The district’s yearly temperature is 14.95ºC (58.91ºF) and it is 2.31% higher than United States’s averages. Affton typically receives about 47.35 millimeters (1.86 inches) of precipitation and has 43.01 rainy days (11.78% of the time) annually.

CountryUnited States
CityMissouri
Longitude-90.3331719
Latitude38.5506084
Attitude/ElevationNonem (0ft)
Local timeSaturday 18:45
Annual high temperature18.25ºC (64.85ºF)
Annual low temperature10.12ºC (50.22ºF)
Average annual precip.47.35mm (1.86in)
Warmest monthJuly (31.04ºC / 87.87ºF)
Coldest MonthJanuary (-2.78ºC / 27.0ºF)
Wettest MonthAugust (72.93mm / 2.87in)
Driest MonthNovember (31.71mm / 1.25in)
Number of days with rainfall (≥ 1.0 mm)43.01 days (11.78%)
Days with no rain321.99 days (88.22%)
Humidity70.88%

Climate Affton: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)18.0(64.4)26.0(78.8)24.0(75.2)28.0(82.4)34.0(93.2)36.0(96.8)37.0(98.6)36.0(96.8)34.0(93.2)34.0(93.2)23.0(73.4)19.0(66.2)37.0(98.6)
Average high °C (°F)3.85(38.93)6.6(43.88)11.34(52.41)16.81(62.26)25.14(77.25)29.81(85.66)31.04(87.87)29.7(85.46)27.89(82.2)18.67(65.61)10.62(51.12)7.49(45.48)18.25(64.85)
Daily mean °C (°F)1.14(34.05)3.39(38.1)8.19(46.74)13.09(55.56)21.78(71.2)26.26(79.27)27.7(81.86)26.26(79.27)24.02(75.24)15.2(59.36)7.52(45.54)4.84(40.71)14.95(58.91)
Average low °C (°F)-2.78(27.0)-1.0(30.2)3.61(38.5)7.57(45.63)16.41(61.54)20.53(68.95)22.46(72.43)21.01(69.82)18.64(65.55)10.53(50.95)3.27(37.89)1.24(34.23)10.12(50.22)
Record low °C (°F)-19.0(-2.2)-12.0(10.4)-14.0(6.8)-3.0(26.6)4.0(39.2)13.0(55.4)18.0(64.4)14.0(57.2)9.0(48.2)-1.0(30.2)-12.0(10.4)-9.0(15.8)-19.0(-2.2)
Average precipitation mm (inches)33.29(1.31)40.04(1.58)50.59(1.99)47.94(1.89)57.56(2.27)69.17(2.72)61.46(2.42)72.93(2.87)31.81(1.25)37.81(1.49)31.71(1.25)33.83(1.33)47.35(1.86)
Average precipitation days (≥ 1.0 mm)2.093.363.553.454.644.915.184.553.732.822.552.183.58
Average relative humidity (%)71.6870.9669.8767.5272.170.3373.4474.3371.1366.370.3372.5170.88
Mean monthly sunshine hours6.778.148.969.4912.4213.5713.3410.7910.679.346.956.889.78

Climate Graph

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

Affton

Affton Temperature by Month

July
27.7°C | 81.86°F
June
26.26°C | 79.27°F
August
26.26°C | 79.27°F
September
24.02°C | 75.24°F
May
21.78°C | 71.2°F
October
15.2°C | 59.36°F
April
13.09°C | 55.56°F
March
8.19°C | 46.74°F
November
7.52°C | 45.54°F
December
4.84°C | 40.71°F
February
3.39°C | 38.1°F
January
1.14°C | 34.05°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature34.0°C (93.2°F)28.33°C (82.99°F)20.0°C (68.0°F)
Avg Temperature30.0°C (86.0°F)24.67°C (76.41°F)16.0°C (60.8°F)
Min Temperature24.0°C (75.2°F)19.4°C (66.92°F)10.0°C (50.0°F)
Dew PointMaxAverageMin
Dew Point22.0°C (71.6°F)17.83°C (64.09°F)8.0°C (46.4°F)
PrecipitationMaxAverageMinSum
Precipitation40.0mm | 1.57in5.82mm | 0.23in0.0mm | 0in174.7mm | 6.88in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind17.0kmh | 10.56mph8.77kmh | 5.45mph4.0kmh | 2.49mph
Gust Wind25.0kmh | 15.53mph13.1kmh | 8.14mph6.0kmh | 3.73mph
Sea Level PressureMaxAverageMin
Sea Level Pressure40.0mb5.82mb0.0mb
Affton

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-09-0128 | 82.422 | 71.67513 | 8.0830.0 | 10168.2 | 0.32
2018-09-0229 | 84.222 | 71.67312 | 7.4630.06 | 10184.1 | 0.16
2018-09-0329 | 84.222 | 71.67311 | 6.8430.12 | 10205.1 | 0.2
2018-09-0429 | 84.222 | 71.67011 | 6.8430.12 | 10200.6 | 0.02
2018-09-0529 | 84.222 | 71.6718 | 4.9730.09 | 101910.3 | 0.41
2018-09-0627 | 80.621 | 69.8767 | 4.3530.12 | 102022.3 | 0.88
2018-09-0725 | 77.022 | 71.6869 | 5.5930.06 | 101821.8 | 0.86
2018-09-0819 | 66.218 | 64.49017 | 10.5629.91 | 101326.4 | 1.04
2018-09-0918 | 64.415 | 59.08312 | 7.4629.91 | 10132.4 | 0.09
2018-09-1022 | 71.615 | 59.0745 | 3.1130.0 | 10160.7 | 0.03
2018-09-1124 | 75.217 | 62.6705 | 3.1130.09 | 10190.0 | 0.0
2018-09-1223 | 73.417 | 62.6747 | 4.3530.12 | 10200.0 | 0.0
2018-09-1326 | 78.818 | 64.4714 | 2.4930.09 | 10190.0 | 0.0
2018-09-1428 | 82.420 | 68.0714 | 2.4930.06 | 10180.4 | 0.02
2018-09-1528 | 82.420 | 68.0687 | 4.3530.06 | 10180.0 | 0.0
2018-09-1628 | 82.421 | 69.8735 | 3.1130.0 | 101613.0 | 0.51
2018-09-1729 | 84.221 | 69.8665 | 3.1129.91 | 10131.5 | 0.06
2018-09-1829 | 84.220 | 68.0646 | 3.7329.91 | 10131.7 | 0.07
2018-09-1929 | 84.222 | 71.6736 | 3.7329.94 | 101440.0 | 1.57
2018-09-2030 | 86.021 | 69.86613 | 8.0829.94 | 10142.0 | 0.08
2018-09-2125 | 77.018 | 64.46914 | 8.730.03 | 10171.5 | 0.06
2018-09-2218 | 64.412 | 53.67110 | 6.2130.18 | 10222.5 | 0.1
2018-09-2321 | 69.815 | 59.0759 | 5.5930.06 | 10180.3 | 0.01
2018-09-2423 | 73.419 | 66.2857 | 4.3529.94 | 10142.1 | 0.08
2018-09-2525 | 77.020 | 68.0819 | 5.5929.91 | 10136.3 | 0.25
2018-09-2618 | 64.410 | 50.06112 | 7.4630.12 | 10201.3 | 0.05
2018-09-2721 | 69.89 | 48.2527 | 4.3530.06 | 10180.2 | 0.01
2018-09-2820 | 68.010 | 50.05910 | 6.2130.12 | 10200.0 | 0.0
2018-09-2916 | 60.88 | 46.46310 | 6.2130.24 | 10240.0 | 0.0
2018-09-3024 | 75.216 | 60.8728 | 4.9730.15 | 10210.0 | 0.0

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