Johnston, Rhode Island, United States Climate

Weather: 4.67°C/40.41°F, Wind SW at 8.23 km/h, 92% Humidity, 0.75% Chance of rain

United States
(Photo by Kawshar Ahmed on Unsplash)

Johnston Climate Summary

Located at an elevation of 74.8 meters (245.41 feet) above sea level, Johnston has a Marine west coast, warm summer climate (Classification: Cfb). The district’s yearly temperature is 12.51ºC (54.52ºF) and it is -0.13% lower than United States’s averages. Johnston typically receives about 16.44 millimeters (0.65 inches) of precipitation and has 32.72 rainy days (8.96% of the time) annually.

CountryUnited States
CityRhode Island
Longitude-71.512617
Latitude41.8205199
Attitude/Elevation74.8m (245.41ft)
Local timeFriday 10:09
Annual high temperature15.47ºC (59.85ºF)
Annual low temperature7.26ºC (45.07ºF)
Average annual precip.16.44mm (0.65in)
Warmest monthJuly (29.58ºC / 85.24ºF)
Coldest MonthJanuary (-3.73ºC / 25.29ºF)
Wettest MonthDecember (23.46mm / 0.92in)
Driest MonthSeptember (8.71mm / 0.34in)
Number of days with rainfall (≥ 1.0 mm)32.72 days (8.96%)
Days with no rain332.28 days (91.04%)
Humidity71.19%

Climate Johnston: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)17.0(62.6)17.0(62.6)18.0(64.4)21.0(69.8)30.0(86.0)34.0(93.2)38.0(100.4)35.0(95.0)33.0(91.4)27.0(80.6)21.0(69.8)17.0(62.6)38.0(100.4)
Average high °C (°F)3.02(37.44)5.19(41.34)7.25(45.05)12.04(53.67)19.48(67.06)25.1(77.18)29.58(85.24)28.31(82.96)23.87(74.97)16.8(62.24)9.92(49.86)5.06(41.11)15.47(59.85)
Daily mean °C (°F)0.42(32.76)2.56(36.61)4.45(40.01)9.21(48.58)16.2(61.16)21.8(71.24)26.22(79.2)24.95(76.91)20.49(68.88)13.95(57.11)7.17(44.91)2.66(36.79)12.51(54.52)
Average low °C (°F)-3.73(25.29)-1.64(29.05)-0.24(31.57)4.06(39.31)9.83(49.69)14.89(58.8)19.58(67.24)18.97(66.15)14.83(58.69)9.24(48.63)2.62(36.72)-1.29(29.68)7.26(45.07)
Record low °C (°F)-19.0(-2.2)-18.0(-0.4)-14.0(6.8)-3.0(26.6)3.0(37.4)7.0(44.6)14.0(57.2)12.0(53.6)7.0(44.6)-1.0(30.2)-9.0(15.8)-11.0(12.2)-19.0(-2.2)
Average precipitation mm (inches)16.02(0.63)16.16(0.64)15.58(0.61)17.23(0.68)12.69(0.5)15.43(0.61)18.73(0.74)17.38(0.68)8.71(0.34)18.55(0.73)17.28(0.68)23.46(0.92)16.44(0.65)
Average precipitation days (≥ 1.0 mm)2.273.272.183.362.732.823.273.451.642.452.732.552.73
Average relative humidity (%)67.7669.5569.9469.7671.2270.7771.8372.5372.6674.1270.9173.271.19
Mean monthly sunshine hours6.798.728.9410.112.5113.1613.512.3310.348.16.716.689.82

Climate Graph

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

Johnston

Johnston Temperature by Month

July
26.22°C | 79.2°F
August
24.95°C | 76.91°F
June
21.8°C | 71.24°F
September
20.49°C | 68.88°F
May
16.2°C | 61.16°F
October
13.95°C | 57.11°F
April
9.21°C | 48.58°F
November
7.17°C | 44.91°F
March
4.45°C | 40.01°F
December
2.66°C | 36.79°F
February
2.56°C | 36.61°F
January
0.42°C | 32.76°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature30.0°C (86.0°F)21.9°C (71.42°F)12.0°C (53.6°F)
Avg Temperature27.0°C (80.6°F)18.35°C (65.03°F)11.0°C (51.8°F)
Min Temperature19.0°C (66.2°F)11.29°C (52.32°F)4.0°C (39.2°F)
Dew PointMaxAverageMin
Dew Point17.0°C (62.6°F)10.74°C (51.33°F)5.0°C (41.0°F)
PrecipitationMaxAverageMinSum
Precipitation4.9mm | 0.19in0.88mm | 0.03in0.0mm | 0in27.2mm | 1.07in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind18.0kmh | 11.18mph10.48kmh | 6.51mph5.0kmh | 3.11mph
Gust Wind30.0kmh | 18.64mph16.19kmh | 10.06mph7.0kmh | 4.35mph
Sea Level PressureMaxAverageMin
Sea Level Pressure4.9mb0.88mb0.0mb
Johnston

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
May° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2018-05-0114 | 57.25 | 41.0689 | 5.5930.03 | 10170.0 | 0.0
2018-05-0223 | 73.48 | 46.44817 | 10.5630.0 | 10160.0 | 0.0
2018-05-0323 | 73.412 | 53.65915 | 9.3229.94 | 10140.5 | 0.02
2018-05-0422 | 71.615 | 59.07416 | 9.9429.88 | 10121.6 | 0.06
2018-05-0518 | 64.47 | 44.65215 | 9.3230.0 | 10160.0 | 0.0
2018-05-0615 | 59.09 | 48.2709 | 5.5930.0 | 10162.1 | 0.08
2018-05-0716 | 60.810 | 50.0768 | 4.9730.06 | 10180.0 | 0.0
2018-05-0818 | 64.48 | 46.4706 | 3.7330.24 | 10240.0 | 0.0
2018-05-0919 | 66.28 | 46.4617 | 4.3530.18 | 10220.0 | 0.0
2018-05-1018 | 64.411 | 51.87512 | 7.4629.94 | 10140.5 | 0.02
2018-05-1118 | 64.48 | 46.4639 | 5.5929.97 | 10150.1 | 0.0
2018-05-1211 | 51.88 | 46.4867 | 4.3530.15 | 10212.2 | 0.09
2018-05-1312 | 53.68 | 46.4857 | 4.3530.15 | 10210.1 | 0.0
2018-05-1417 | 62.610 | 50.0799 | 5.5930.0 | 10160.0 | 0.0
2018-05-1521 | 69.815 | 59.08413 | 8.0829.85 | 10110.3 | 0.01
2018-05-1615 | 59.011 | 51.8838 | 4.9730.12 | 10200.7 | 0.03
2018-05-1717 | 62.614 | 57.2925 | 3.1130.03 | 10174.1 | 0.16
2018-05-1814 | 57.25 | 41.06015 | 9.3230.33 | 10270.0 | 0.0
2018-05-1911 | 51.88 | 46.48810 | 6.2130.3 | 10264.6 | 0.18
2018-05-2019 | 66.217 | 62.69315 | 9.3229.97 | 10154.9 | 0.19
2018-05-2121 | 69.810 | 50.0668 | 4.9730.15 | 10210.0 | 0.0
2018-05-2217 | 62.611 | 51.8786 | 3.7330.12 | 10200.8 | 0.03
2018-05-2322 | 71.612 | 53.6718 | 4.9729.91 | 10132.0 | 0.08
2018-05-2420 | 68.010 | 50.0669 | 5.5930.09 | 10190.0 | 0.0
2018-05-2524 | 75.211 | 51.85617 | 10.5629.91 | 10130.0 | 0.0
2018-05-2627 | 80.616 | 60.86312 | 7.4629.83 | 10100.0 | 0.0
2018-05-2712 | 53.611 | 51.89018 | 11.1830.09 | 10192.6 | 0.1
2018-05-2817 | 62.612 | 53.6839 | 5.5930.06 | 10180.1 | 0.0
2018-05-2925 | 77.016 | 60.8778 | 4.9730.0 | 10160.0 | 0.0
2018-05-3022 | 71.614 | 57.2738 | 4.9730.15 | 10210.0 | 0.0
2018-05-3121 | 69.813 | 55.47410 | 6.2130.06 | 10180.0 | 0.0

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