St. Helens, Oregon, United States Climate

Weather: 23.19°C/73.74°F, Wind SW at 3.09 km/h, 23% Humidity, 0% Chance of rain

United States
(Photo by everett mcintire on Unsplash)
Contents

St. Helens Climate Summary

Located at an elevation of None meters (0 feet) above sea level, St. Helens has a Mediterranean, warm summer climate (Classification: Csb). The district’s yearly temperature is 12.48ºC (54.46ºF) and it is -0.16% lower than United States’s averages. St. Helens typically receives about 37.77 millimeters (1.49 inches) of precipitation and has 42.81 rainy days (11.73% of the time) annually.

CountryUnited States
CityOregon
Longitude-122.8212356
Latitude45.858961
Attitude/ElevationNonem (0ft)
Local timeWednesday 00:56
Annual high temperature16.12ºC (61.02ºF)
Annual low temperature5.91ºC (42.64ºF)
Average annual precip.37.77mm (1.49in)
Warmest monthAugust (26.65ºC / 79.97ºF)
Coldest MonthFebruary (0.01ºC / 32.02ºF)
Wettest MonthJanuary (87.45mm / 3.44in)
Driest MonthJuly (4.54mm / 0.18in)
Number of days with rainfall (≥ 1.0 mm)42.81 days (11.73%)
Days with no rain322.19 days (88.27%)
Humidity77.06%

Climate St. Helens: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)15.0(59.0)15.0(59.0)21.0(69.8)31.0(87.8)32.0(89.6)35.0(95.0)37.0(98.6)37.0(98.6)35.0(95.0)31.0(87.8)18.0(64.4)12.0(53.6)37.0(98.6)
Average high °C (°F)8.24(46.83)7.18(44.92)11.28(52.3)14.56(58.21)20.11(68.2)21.59(70.86)26.2(79.16)26.65(79.97)22.7(72.86)16.28(61.3)10.99(51.78)7.62(45.72)16.12(61.02)
Daily mean °C (°F)6.05(42.89)4.44(39.99)7.48(45.46)11.19(52.14)16.19(61.14)17.76(63.97)21.55(70.79)21.66(70.99)17.91(64.24)12.26(54.07)7.9(46.22)5.35(41.63)12.48(54.46)
Average low °C (°F)2.25(36.05)0.01(32.02)1.7(35.06)4.44(39.99)7.68(45.82)8.67(47.61)11.66(52.99)12.24(54.03)10.53(50.95)6.31(43.36)3.66(38.59)1.78(35.2)5.91(42.64)
Record low °C (°F)-7.0(19.4)-8.0(17.6)-5.0(23.0)-1.0(30.2)2.0(35.6)4.0(39.2)7.0(44.6)7.0(44.6)0.0(0)-2.0(28.4)-4.0(24.8)-3.0(26.6)-8.0(17.6)
Average precipitation mm (inches)87.45(3.44)47.65(1.88)35.26(1.39)41.62(1.64)27.01(1.06)23.98(0.94)4.54(0.18)4.95(0.19)27.22(1.07)36.95(1.45)46.85(1.84)69.75(2.75)37.77(1.49)
Average precipitation days (≥ 1.0 mm)6.274.734.094.363.092.731.181.363.03.093.915.03.57
Average relative humidity (%)86.4584.7677.5677.2373.1172.0167.9668.0873.774.4481.9887.477.06
Mean monthly sunshine hours5.717.389.179.0912.6614.5814.2911.4410.339.066.265.589.63

Climate Graph

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

St. Helens

St. Helens Temperature by Month

August
21.66°C | 70.99°F
July
21.55°C | 70.79°F
September
17.91°C | 64.24°F
June
17.76°C | 63.97°F
May
16.19°C | 61.14°F
October
12.26°C | 54.07°F
April
11.19°C | 52.14°F
November
7.9°C | 46.22°F
March
7.48°C | 45.46°F
January
6.05°C | 42.89°F
December
5.35°C | 41.63°F
February
4.44°C | 39.99°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)22.13°C (71.83°F)17.0°C (62.6°F)
Avg Temperature25.0°C (77.0°F)17.6°C (63.68°F)14.0°C (57.2°F)
Min Temperature15.0°C (59.0°F)9.87°C (49.77°F)6.0°C (42.8°F)
Dew PointMaxAverageMin
Dew Point12.0°C (53.6°F)9.27°C (48.69°F)6.0°C (42.8°F)
PrecipitationMaxAverageMinSum
Precipitation16.4mm | 0.65in2.12mm | 0.08in0.0mm | 0in63.7mm | 2.51in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind9.0kmh | 5.59mph5.6kmh | 3.48mph2.0kmh | 1.24mph
Gust Wind14.0kmh | 8.7mph8.67kmh | 5.39mph4.0kmh | 2.49mph
Sea Level PressureMaxAverageMin
Sea Level Pressure16.4mb2.12mb0.0mb
St. Helens

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-09-0118 | 64.410 | 50.0727 | 4.3530.12 | 10200.0 | 0.0
2018-09-0220 | 68.09 | 48.2688 | 4.9730.06 | 10180.0 | 0.0
2018-09-0319 | 66.210 | 50.0718 | 4.9730.09 | 10190.0 | 0.0
2018-09-0420 | 68.09 | 48.2657 | 4.3530.06 | 10180.0 | 0.0
2018-09-0525 | 77.08 | 46.4485 | 3.1129.97 | 10150.0 | 0.0
2018-09-0624 | 75.211 | 51.8564 | 2.4930.06 | 10180.0 | 0.0
2018-09-0721 | 69.810 | 50.0665 | 3.1130.09 | 10190.0 | 0.0
2018-09-0818 | 64.411 | 51.8724 | 2.4930.09 | 10191.3 | 0.05
2018-09-0919 | 66.210 | 50.0685 | 3.1130.0 | 10160.0 | 0.0
2018-09-1017 | 62.612 | 53.6824 | 2.4930.03 | 10175.7 | 0.22
2018-09-1115 | 59.011 | 51.8884 | 2.4929.97 | 10156.9 | 0.27
2018-09-1214 | 57.210 | 50.0884 | 2.4929.94 | 101410.4 | 0.41
2018-09-1314 | 57.210 | 50.0855 | 3.1129.97 | 10154.9 | 0.19
2018-09-1415 | 59.09 | 48.2803 | 1.8629.97 | 10152.5 | 0.1
2018-09-1514 | 57.29 | 48.2845 | 3.1129.88 | 10127.9 | 0.31
2018-09-1614 | 57.29 | 48.2809 | 5.5929.97 | 101516.4 | 0.65
2018-09-1715 | 59.06 | 42.8707 | 4.3530.09 | 10190.0 | 0.0
2018-09-1815 | 59.07 | 44.6717 | 4.3530.09 | 10190.0 | 0.0
2018-09-1916 | 60.88 | 46.4735 | 3.1130.09 | 10190.0 | 0.0
2018-09-2017 | 62.68 | 46.4742 | 1.2430.12 | 10200.0 | 0.0
2018-09-2118 | 64.410 | 50.0705 | 3.1129.97 | 10150.0 | 0.0
2018-09-2215 | 59.011 | 51.8869 | 5.5930.0 | 10166.4 | 0.25
2018-09-2314 | 57.27 | 44.6756 | 3.7330.15 | 10210.2 | 0.01
2018-09-2416 | 60.87 | 44.6727 | 4.3530.21 | 10230.0 | 0.0
2018-09-2518 | 64.47 | 44.6637 | 4.3530.21 | 10230.0 | 0.0
2018-09-2620 | 68.08 | 46.4586 | 3.7330.12 | 10200.0 | 0.0
2018-09-2723 | 73.411 | 51.8594 | 2.4929.97 | 10150.0 | 0.0
2018-09-2823 | 73.410 | 50.0545 | 3.1129.83 | 10100.0 | 0.0
2018-09-2916 | 60.810 | 50.0755 | 3.1129.8 | 10090.1 | 0.0
2018-09-3015 | 59.010 | 50.0776 | 3.7329.88 | 10121.0 | 0.04

St. Helens 3 Year Historical Weather Data

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