Current Conditions

Iruma, Saitama

76°F24°C
Rain

Wind

SW 2 mph3 km/h

Humidity

91%

Cloud Cover

99%

As of Thursday, September 3, 2026 at 5:07 AM GMT+9

Today's Outlook

Day

Overcast and warm, with a high of 83°F28°C and morning low of 76°F24°C. Light wind from the NE around 3 mph5 km/h. 62% chance of light rain throughout the day. Heavy, humid air.

Night

Overcast, with a low around 74°F23°C. Light wind from the N around 3 mph5 km/h. 86% chance of rain in the evening.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
RainHigh 83°F28°CFeels 89°F31°CLow 74°F23°CPrecip 0.23 in5.8 mm86%Cloud 99%Wind NNE 3 mph5 km/hThursday: Overcast and warm, with a high of 83°F28°C and morning low of 76°F24°C. Light wind from the NE around 3 mph5 km/h. 62% chance of light rain throughout the day. Heavy, humid air. Thursday Night: Overcast, with a low around 74°F23°C. Light wind from the N around 3 mph5 km/h. 86% chance of rain in the evening.
RainHigh 77°F25°CLow 72°F22°CPrecip 0.47 in11.9 mm95%Cloud 99%Wind NE 3 mph5 km/hFriday: Overcast and warm, with a high of 77°F25°C. Light wind from the NE around 3 mph5 km/h. 89% chance of light rain throughout the day. Heavy, humid air. Friday Night: Overcast, with a low around 72°F22°C. Light wind from the NNE around 3 mph4 km/h. 95% chance of rain throughout the night.
RainHigh 74°F23°CLow 68°F20°CPrecip 0.79 in20 mm97%Cloud 98%Wind NE 4 mph7 km/hSaturday: Overcast and warm, with a high of 74°F23°C and morning low of 68°F20°C. Light wind from the NE around 5 mph8 km/h. 91% chance of rain throughout the day. Humid. Saturday Night: Overcast, with a low around 69°F20°C. Light wind from the NE around 4 mph6 km/h. 97% chance of rain throughout the night.
RainHigh 72°F22°CLow 68°F20°CPrecip 1.17 in29.7 mm92%Cloud 99%Wind N 7 mph11 km/hSunday: Overcast and warm, with a high of 72°F22°C. Breezy from the NNE at 8 mph12 km/h. 88% chance of rain throughout the day. Humid. Sunday Night: Overcast, with a low around 68°F20°C. Breezy from the N at 6 to 7 mph10 to 12 km/h. 92% chance of rain throughout the night.
Heavy RainHigh 75°F24°CLow 69°F21°CPrecip 2.96 in75.1 mm96%Cloud 97%Wind NNW 7 mph11 km/hMonday: Overcast and warm, with a high of 75°F24°C and morning low of 69°F21°C. Breezy from the NNW at 7 to 8 mph11 to 13 km/h. 96% chance of heavy rain throughout the day. Humid. Monday Night: Overcast, with a low around 69°F21°C. Breezy from the NNW at 7 to 9 mph11 to 14 km/h. 95% chance of heavy rain throughout the night.
RainHigh 81°F27°CFeels 86°F30°CLow 72°F22°CPrecip 0.53 in13.4 mm61%Cloud 80%Wind S 5 mph8 km/hTuesday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 72°F22°C. Light wind from the SSE around 5 mph8 km/h. 60% chance of light rain throughout the day. Heavy, humid air. Tuesday Night: Overcast, with a low around 72°F22°C. Light wind from the SSW around 4 mph7 km/h. 61% chance of rain throughout the night.
Light RainHigh 83°F28°CFeels 90°F32°CLow 74°F23°CPrecip 0.43 in10.8 mm61%Cloud 74%Wind S 4 mph7 km/hWednesday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 74°F23°C — feels like 90°F32°C. Breezy from the SSE at 5 to 7 mph8 to 11 km/h. 61% chance of light rain throughout the day. Heavy, humid air. Wednesday Night: Mostly cloudy, with a low around 74°F23°C. Light wind from the S around 4 mph7 km/h. 58% chance of light rain throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
ThursdaySep 383°F28°C
Feels 89°F31°C
74°F23°C0.23 in5.8 mm· 86%99%RainNNE 3 mph5 km/h
FridaySep 477°F25°C72°F22°C0.47 in11.9 mm· 95%99%RainNE 3 mph5 km/h
SaturdaySep 574°F23°C68°F20°C0.79 in20 mm· 97%98%RainNE 4 mph7 km/h
SundaySep 672°F22°C68°F20°C1.17 in29.7 mm· 92%99%RainN 7 mph11 km/h
MondaySep 775°F24°C69°F21°C2.96 in75.1 mm· 96%97%Heavy RainNNW 7 mph11 km/h
TuesdaySep 881°F27°C
Feels 86°F30°C
72°F22°C0.53 in13.4 mm· 61%80%RainS 5 mph8 km/h
WednesdaySep 983°F28°C
Feels 90°F32°C
74°F23°C0.43 in10.8 mm· 61%74%Light RainS 4 mph7 km/h
ThursdaySep 1079°F26°C72°F22°C0.65 in16.4 mm· 75%84%RainENE 5 mph8 km/h
FridaySep 1175°F24°C70°F21°C0.35 in9 mm· 68%90%Light RainNE 4 mph7 km/h
SaturdaySep 1276°F24°C69°F20°C0.26 in6.7 mm· 49%86%Light RainNE 4 mph6 km/h
SundaySep 1377°F25°C69°F21°C0.24 in6.2 mm· 51%83%Light RainNE 4 mph6 km/h
MondaySep 1477°F25°C70°F21°C0.31 in7.9 mm· 52%82%Light RainNE 4 mph6 km/h
TuesdaySep 1577°F25°C69°F21°C0.39 in10 mm· 59%84%Light RainNE 4 mph6 km/h
WednesdaySep 1677°F25°C69°F21°C0.43 in10.8 mm· 58%83%Light RainNE 4 mph6 km/h
ThursdaySep 1777°F25°C69°F21°C0.36 in9.2 mm· 57%82%Light RainNNE 4 mph7 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 35.8180°N, 139.3680°E·Elevation: 126m·Timezone: Asia/Tokyo·Population: 147,166