Iiyama-Shi, Nagano, Japan Climate

Weather: 8.31°C/46.96°F, Wind SW at 3.75 km/h, 89% Humidity, 2.37% Chance of rain

Japan
(Photo by Kaito Kinjo on Unsplash)

Iiyama-shi Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Iiyama-shi has a Humid continental, no dry season, warm summer climate (Classification: Dfb). The district’s yearly temperature is 11.83ºC (53.29ºF) and it is -3.36% lower than Japan’s averages. Iiyama-shi typically receives about 83.52 millimeters (3.29 inches) of precipitation and has 172.22 rainy days (47.18% of the time) annually.

CountryJapan
CityNagano
Longitude138.3654889
Latitude36.8517344
Attitude/ElevationNonem (0ft)
Local timeThursday 14:01
Annual high temperature15.32ºC (59.58ºF)
Annual low temperature5.48ºC (41.86ºF)
Average annual precip.83.52mm (3.29in)
Warmest monthAugust (29.92ºC / 85.86ºF)
Coldest MonthJanuary (-7.09ºC / 19.24ºF)
Wettest MonthJuly (171.56mm / 6.75in)
Driest MonthNovember (50.34mm / 1.98in)
Number of days with rainfall (≥ 1.0 mm)172.22 days (47.18%)
Days with no rain192.78 days (52.82%)
Humidity85.88%

Climate Iiyama-shi: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)9.56(49.21)14.88(58.78)22.31(72.16)27.62(81.72)37.19(98.94)35.06(95.11)37.19(98.94)38.25(100.85)36.12(97.02)29.75(85.55)21.25(70.25)20.19(68.34)38.25(100.85)
Average high °C (°F)0.53(32.95)1.76(35.17)6.81(44.26)13.45(56.21)21.02(69.84)24.34(75.81)28.18(82.72)29.92(85.86)24.72(76.5)17.99(64.38)11.24(52.23)3.93(39.07)15.32(59.58)
Daily mean °C (°F)-2.2(28.04)-1.3(29.66)3.28(37.9)9.69(49.44)17.03(62.65)20.8(69.44)24.86(76.75)26.06(78.91)20.75(69.35)13.99(57.18)7.75(45.95)1.15(34.07)11.83(53.29)
Average low °C (°F)-7.09(19.24)-6.69(19.96)-2.62(27.28)2.59(36.66)8.35(47.03)12.61(54.7)18.06(64.51)19.0(66.2)14.58(58.24)7.89(46.2)2.54(36.57)-3.42(25.84)5.48(41.86)
Record low °C (°F)-18.06(-0.51)-19.12(-2.42)-17.0(1.4)-9.56(14.79)-2.12(28.18)3.19(37.74)10.62(51.12)11.69(53.04)4.25(39.65)-2.12(28.18)-5.31(22.44)-17.0(1.4)-19.12(-2.42)
Average precipitation mm (inches)70.3(2.77)51.16(2.01)64.39(2.54)61.16(2.41)60.54(2.38)104.32(4.11)171.56(6.75)122.46(4.82)90.15(3.55)81.63(3.21)50.34(1.98)74.29(2.92)83.52(3.29)
Average precipitation days (≥ 1.0 mm)14.9711.9713.0410.9110.8215.7522.520.7713.7210.7211.515.5514.35
Average relative humidity (%)91.8690.8684.5479.4976.3784.3488.1686.1887.6487.4285.7988.085.88
Mean monthly sunshine hours7.197.5710.0313.1214.0814.1713.9213.611.6110.038.137.6410.92

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Iiyama-shi in recent years.

Iiyama-shi

Iiyama-shi Temperature by Month

August
26.06°C | 78.91°F
July
24.86°C | 76.75°F
June
20.8°C | 69.44°F
September
20.75°C | 69.35°F
May
17.03°C | 62.65°F
October
13.99°C | 57.18°F
April
9.69°C | 49.44°F
November
7.75°C | 45.95°F
March
3.28°C | 37.9°F
December
1.15°C | 34.07°F
February
-1.3°C | 29.66°F
January
-2.2°C | 28.04°F

Historical Data

Summary
  • 2010
  • 2011
  • 2012
  • 2013
  • 2014
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature29.75°C (85.55°F)21.49°C (70.68°F)13.81°C (56.86°F)
Avg Temperature24.44°C (75.99°F)17.62°C (63.72°F)10.62°C (51.12°F)
Min Temperature13.81°C (56.86°F)8.53°C (47.35°F)1.06°C (33.91°F)
Dew PointMaxAverageMin
Dew Point14.88°C (58.78°F)10.59°C (51.06°F)3.19°C (37.74°F)
PrecipitationMaxAverageMinSum
Precipitation9.67mm | 0.38in1.73mm | 0.07in0.0mm | 0in53.67mm | 2.11in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind9.56kmh | 5.94mph5.24kmh | 3.26mph3.19kmh | 1.98mph
Gust Wind14.88kmh | 9.25mph8.3kmh | 5.16mph4.25kmh | 2.64mph
Sea Level PressureMaxAverageMin
Sea Level Pressure9.67mb1.73mb0.0mb
Iiyama-shi

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
May° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2017-05-0111.69 | 53.047.44 | 45.39846.38 | 3.9631.82 | 1077.382.76 | 0.11
2017-05-0210.62 | 51.123.19 | 37.74676.38 | 3.9632.13 | 1088.00.0 | 0
2017-05-0315.94 | 60.697.44 | 45.39694.25 | 2.6432.19 | 1090.120.0 | 0
2017-05-0417.0 | 62.68.5 | 47.3715.31 | 3.332.1 | 1086.940.11 | 0.0
2017-05-0518.06 | 64.5110.62 | 51.12755.31 | 3.331.91 | 1080.560.11 | 0.0
2017-05-0615.94 | 60.6912.75 | 54.95864.25 | 2.6431.75 | 1075.251.17 | 0.05
2017-05-0714.88 | 58.785.31 | 41.56657.44 | 4.6231.69 | 1073.120.64 | 0.03
2017-05-0817.0 | 62.64.25 | 39.65599.56 | 5.9431.72 | 1074.190.0 | 0
2017-05-0915.94 | 60.696.38 | 43.48644.25 | 2.6431.91 | 1080.560.0 | 0
2017-05-1015.94 | 60.6910.62 | 51.12837.44 | 4.6231.75 | 1075.253.19 | 0.13
2017-05-1115.94 | 60.6910.62 | 51.12807.44 | 4.6231.69 | 1073.122.23 | 0.09
2017-05-1219.12 | 66.4210.62 | 51.12724.25 | 2.6431.82 | 1077.380.64 | 0.03
2017-05-1313.81 | 56.8612.75 | 54.95947.44 | 4.6231.66 | 1072.069.67 | 0.38
2017-05-1418.06 | 64.5112.75 | 54.95834.25 | 2.6431.69 | 1073.120.85 | 0.03
2017-05-1515.94 | 60.6910.62 | 51.12835.31 | 3.331.69 | 1073.120.32 | 0.01
2017-05-1613.81 | 56.867.44 | 45.39796.38 | 3.9631.69 | 1073.120.0 | 0
2017-05-1713.81 | 56.868.5 | 47.3825.31 | 3.331.69 | 1073.121.27 | 0.05
2017-05-1814.88 | 58.789.56 | 49.21814.25 | 2.6431.85 | 1078.442.66 | 0.1
2017-05-1919.12 | 66.4211.69 | 53.04724.25 | 2.6431.91 | 1080.560.0 | 0
2017-05-2022.31 | 72.1612.75 | 54.95675.31 | 3.331.88 | 1079.50.0 | 0
2017-05-2124.44 | 75.9913.81 | 56.86663.19 | 1.9831.88 | 1079.50.21 | 0.01
2017-05-2223.38 | 74.0814.88 | 58.78724.25 | 2.6431.85 | 1078.442.44 | 0.1
2017-05-2322.31 | 72.1614.88 | 58.78774.25 | 2.6431.75 | 1075.252.44 | 0.1
2017-05-2419.12 | 66.4213.81 | 56.86813.19 | 1.9831.69 | 1073.120.32 | 0.01
2017-05-2515.94 | 60.6913.81 | 56.86913.19 | 1.9831.6 | 1069.948.18 | 0.32
2017-05-2618.06 | 64.5113.81 | 56.86875.31 | 3.331.53 | 1067.816.91 | 0.27
2017-05-2717.0 | 62.610.62 | 51.12784.25 | 2.6431.66 | 1072.061.49 | 0.06
2017-05-2817.0 | 62.69.56 | 49.21766.38 | 3.9631.78 | 1076.310.11 | 0.0
2017-05-2921.25 | 70.2510.62 | 51.12644.25 | 2.6431.78 | 1076.310.0 | 0
2017-05-3024.44 | 75.9914.88 | 58.78704.25 | 2.6431.72 | 1074.192.02 | 0.08
2017-05-3123.38 | 74.0813.81 | 56.86695.31 | 3.331.6 | 1069.943.93 | 0.15

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