Issaquah, Washington, United States Climate

Weather: 9.5°C/49.1°F, Wind SW at 5.36 km/h, 70% Humidity, 0% Chance of rain

United States
(Photo by Dave Hoefler on Unsplash)
Contents

Issaquah Climate Summary

Located at an elevation of 32.57 meters (106.86 feet) above sea level, Issaquah has a Mediterranean, warm summer climate (Classification: Csb). The district’s yearly temperature is 12.07ºC (53.73ºF) and it is -0.57% lower than United States’s averages. Issaquah typically receives about 84.4 millimeters (3.32 inches) of precipitation and has 144.73 rainy days (39.65% of the time) annually.

CountryUnited States
CityWashington
Longitude-122.0326191
Latitude47.5301011
Attitude/Elevation32.57m (106.86ft)
Local timeWednesday 09:30
Annual high temperature15.74ºC (60.33ºF)
Annual low temperature5.0ºC (41.0ºF)
Average annual precip.84.4mm (3.32in)
Warmest monthAugust (26.28ºC / 79.3ºF)
Coldest MonthFebruary (0.3ºC / 32.54ºF)
Wettest MonthJanuary (137.56mm / 5.42in)
Driest MonthJuly (16.24mm / 0.64in)
Number of days with rainfall (≥ 1.0 mm)144.73 days (39.65%)
Days with no rain220.27 days (60.35%)
Humidity78.36%

Climate Issaquah: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)16.0(60.8)18.0(64.4)25.0(77.0)30.0(86.0)31.0(87.8)36.0(96.8)36.0(96.8)37.0(98.6)37.0(98.6)30.0(86.0)21.0(69.8)14.0(57.2)37.0(98.6)
Average high °C (°F)7.64(45.75)8.19(46.74)11.03(51.85)13.95(57.11)19.11(66.4)21.53(70.75)25.84(78.51)26.28(79.3)22.52(72.54)16.1(60.98)9.98(49.96)6.77(44.19)15.74(60.33)
Daily mean °C (°F)4.48(40.06)4.98(40.96)7.45(45.41)10.41(50.74)15.53(59.95)18.13(64.63)21.82(71.28)21.64(70.95)17.73(63.91)12.09(53.76)6.74(44.13)3.82(38.88)12.07(53.73)
Average low °C (°F)0.84(33.51)0.3(32.54)1.71(35.08)3.28(37.9)5.67(42.21)7.42(45.36)10.12(50.22)11.26(52.27)9.64(49.35)6.28(43.3)2.88(37.18)0.54(32.97)5.0(41.0)
Record low °C (°F)-16.0(3.2)-15.0(5.0)-5.0(23.0)-4.0(24.8)-3.0(26.6)0.0(0)2.0(35.6)2.0(35.6)2.0(35.6)-3.0(26.6)-14.0(6.8)-10.0(14.0)-16.0(3.2)
Average precipitation mm (inches)137.56(5.42)111.22(4.38)122.95(4.84)86.71(3.41)49.72(1.96)42.98(1.69)16.24(0.64)21.81(0.86)52.95(2.08)111.48(4.39)129.86(5.11)129.35(5.09)84.4(3.32)
Average precipitation days (≥ 1.0 mm)16.7314.5517.014.8210.2710.273.734.099.2713.2716.0914.6412.06
Average relative humidity (%)84.2484.7482.5880.175.1774.369.4770.2373.8878.382.8384.4578.36
Mean monthly sunshine hours6.156.229.1111.8112.9813.1813.6913.3811.277.226.235.939.76

Climate Graph

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

Issaquah

Issaquah Temperature by Month

July
21.82°C | 71.28°F
August
21.64°C | 70.95°F
June
18.13°C | 64.63°F
September
17.73°C | 63.91°F
May
15.53°C | 59.95°F
October
12.09°C | 53.76°F
April
10.41°C | 50.74°F
March
7.45°C | 45.41°F
November
6.74°C | 44.13°F
February
4.98°C | 40.96°F
January
4.48°C | 40.06°F
December
3.82°C | 38.88°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2012
  • 2011
  • 2010
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature11.0°C (51.8°F)5.11°C (41.2°F)-1.0°C (30.2°F)
Avg Temperature8.0°C (46.4°F)1.86°C (35.35°F)-3.0°C (26.6°F)
Min Temperature5.0°C (41.0°F)-3.39°C (25.9°F)-10.0°C (14.0°F)
Dew PointMaxAverageMin
Dew Point5.0°C (41.0°F)-1.93°C (28.53°F)-9.0°C (15.8°F)
PrecipitationMaxAverageMinSum
Precipitation16.5mm | 0.65in3.3mm | 0.13in0.0mm | 0in92.3mm | 3.63in
Snowdepth6.5mm | 0.26in0.78mm | 0.03in0.0mm | 0in21.800000000000004mm | 0.86in
WindMaxAverageMin
Wind9.0kmh | 5.59mph5.96kmh | 3.7mph3.0kmh | 1.86mph
Gust Wind17.0kmh | 10.56mph10.5kmh | 6.52mph6.0kmh | 3.73mph
Sea Level PressureMaxAverageMin
Sea Level Pressure16.5mb3.3mb0.0mb
Issaquah

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
February° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2019-02-018 | 46.45 | 41.0837 | 4.3529.77 | 100812.3 | 0.48
2019-02-027 | 44.65 | 41.0885 | 3.1129.62 | 10032.0 | 0.08
2019-02-034 | 39.21 | 33.8825 | 3.1129.44 | 9973.7 | 0.15
2019-02-04-3 | 26.6-4 | 24.8929 | 5.5929.65 | 10043.9 | 0.15
2019-02-05-3 | 26.6-7 | 19.4854 | 2.4929.91 | 10130.0 | 0.0
2019-02-06-2 | 28.4-6 | 21.2853 | 1.8630.27 | 10250.0 | 0.0
2019-02-07-1 | 30.2-6 | 21.2825 | 3.1130.36 | 10280.0 | 0.0
2019-02-080 | 32.0-2 | 28.4895 | 3.1130.06 | 10187.6 | 0.3
2019-02-09-2 | 28.4-4 | 24.8898 | 4.9729.83 | 10103.5 | 0.14
2019-02-10-2 | 28.4-5 | 23.0897 | 4.3529.8 | 10091.9 | 0.07
2019-02-110 | 32.0-1 | 30.2975 | 3.1129.8 | 100914.8 | 0.58
2019-02-121 | 33.81 | 33.8997 | 4.3529.71 | 100616.5 | 0.65
2019-02-131 | 33.80 | 32.0986 | 3.7329.62 | 10030.8 | 0.03
2019-02-142 | 35.6-0 | 32.0958 | 4.9729.38 | 9953.7 | 0.15
2019-02-154 | 39.21 | 33.8917 | 4.3529.62 | 10030.8 | 0.03
2019-02-163 | 37.40 | 32.0926 | 3.7329.85 | 10110.5 | 0.02
2019-02-172 | 35.6-0 | 32.0945 | 3.1130.18 | 10220.6 | 0.02
2019-02-183 | 37.4-1 | 30.2894 | 2.4930.36 | 10280.2 | 0.01
2019-02-194 | 39.22 | 35.6956 | 3.7330.09 | 101910.5 | 0.41
2019-02-202 | 35.60 | 32.0925 | 3.1129.88 | 10120.9 | 0.04
2019-02-213 | 37.4-3 | 26.6805 | 3.1130.15 | 10210.0 | 0.0
2019-02-223 | 37.4-2 | 28.4788 | 4.9730.0 | 10163.9 | 0.15
2019-02-234 | 39.20 | 32.0888 | 4.9730.12 | 10203.3 | 0.13
2019-02-243 | 37.4-2 | 28.4805 | 3.1130.0 | 10160.6 | 0.02
2019-02-252 | 35.6-6 | 21.2686 | 3.7329.91 | 10130.0 | 0.0
2019-02-261 | 33.8-9 | 15.8547 | 4.3530.12 | 10200.0 | 0.0
2019-02-274 | 39.2-6 | 21.2567 | 4.3529.97 | 10150.3 | 0.01
2019-02-284 | 39.2-5 | 23.0684 | 2.4930.12 | 10200.0 | 0.0

Issaquah 11 Year Historical Weather Data

Nearby locations

Comments (0)

  • Latest first
  • Highest rated
Be the first to comment on this page