Saitama, Japan
Iruma
Iruma is a city in Saitama, Japan. It has a population of about 147,166. The climate is classified as humid subtropical (Köppen Cfa), with rain spread through the year and no real dry season.
Now12°C
Best timeApr · Oct–Nov
Population147,166
Local time16:31
35.82° N, 139.37° EElevation 126 mUTC+9 · Japan Standard Time
Postal codes358-8501, 358-8510 …October: high / low20° / 13°
Rain this month170mm
Best timeApr · Oct–Nov
Best: Apr · Oct–Nov. Warmth, sunshine and dry days, month by month.
Iruma at a glance
Sunrise · sunset06:02 · 16:5210 h 50 min of daylightThe moon tonightWaning gibbous87% · Moonrise 18:59Next holiday3 NovemberCulture DayNext eclipse21 Feb 2027Penumbral lunar eclipse
Best time to visitApr · Oct–Nov
The months with the highest weather score
Warmest month29°C
Average high in August
Coolest month-2°C
Average low in January
Wettest monthJuly
165 mm of rain
Driest monthJanuary
41 mm of rain
Monuments nearby10+
within 15 km
Weather in Iruma
Now and the next ten days. The 14 and 30-day outlooks are one click away.
12°C
Today hour by hourCloudy · wind 1 km/h · humidity 83%
Today29 Oct15°8°
Fri30 Oct17°11°0.5 mm
Sat31 Oct21°11°2.6 mm
Sun1 Nov17°8°
Mon2 Nov15°12°2.2 mm
Tue3 Nov20°11°
Wed4 Nov14°12°2.9 mm
Thu5 Nov17°12°9.1 mm
Fri6 Nov19°11°
Sat7 Nov14°10°
When to go to Iruma
Each month's weather score (warmth, sun, dry days) with its temperatures and rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Score | 48 | 45 | 36 | 62 | 57 | 53 | 45 | 44 | 58 | 66 | 68 | 48 |
| High | 7° | 8° | 11° | 17° | 21° | 24° | 28° | 29° | 25° | 20° | 15° | 10° |
| Low | -2° | -2° | 2° | 8° | 13° | 17° | 21° | 22° | 19° | 13° | 7° | 1° |
| Rain (mm) | 41 | 44 | 86 | 105 | 124 | 155 | 165 | 200 | 212 | 170 | 72 | 41 |
| Wet days | 4 | 5 | 10 | 11 | 15 | 16 | 22 | 19 | 18 | 12 | 6 | 4 |
What's on in Iruma
Concerts, football matches, the public holidays ahead and the town's festivals through the year.
Monuments and museums in Iruma
10 km
Shōfuku-ji TempleBuilt 1270
5.8 km
Yamaguchi ReservoirBuilt 1927
13 km
Takiyama CastleBuilt 1521
10 km
Showa Retro Packaging MuseumBuilt 1999
9.3 km
Koma Village Stone Age Dwelling Site
15 km
Kawagoekan
Museum3.9 km
Sayama City MuseumMuseum1.8 km
Iruma City MuseumMore museums: 中村屋 肉まんミュージアム
Outdoors around Iruma
Hiking routes from the town, and what there is to do within 15 km: huts, viewpoints, climbing, camping, ski areas and dive sites.
Viewpoints44Golf courses41Camp sites9Hot springs & thermal baths6Theme parks6Climbing4Zoos2Water parks1
Seibuen YuenchiTheme parks
0.7 kmHamura Zoological ParkZoos
1 kmColonel RockClimbing
1.6 kmRainbow PoolWater parks
1.9 kmMusashigaoka Golf CourseGolf courses
2.1 km山田大橋キャンプ場Camp sites
2.3 kmNature around Iruma
Wildlife in October
The birds and mammals of Japan seen most this month, compared with the rest of their year.
The sky over Iruma
Earthquakes around Iruma
The last 30 days within 300 km, and the record since 1950.
Last 30 days16magnitude 2.5+ within 300 kmSince 1950361magnitude 5+ within 150 kmSignificant earthquakes on record137within 300 km
Strongest nearby since 1950
6.7Chōnan 4 km ↙1987 · 92 km
6.6Ōshima 12 km ↖1978 · 113 km
6.4Ōshima 11 km ↙1990 · 124 km
6.3Ōarai 25 km ↗2005 · 147 km
Tropical storms · Iruma
Universities and research institutes
The Graduate School of Management and Education TechnologyUniversity or college · founded 2025
Towns and villages around Iruma
Each with its own page: weather, climate and the best time to visit.
Iruma from above
Around Iruma34 places to see, do and reach nearby
Iruma RiverNature5.0 kmAkigawa RiverNature12 kmYamaguchi ReservoirNature5.8 kmKasumi RiverNature4.5 kmNariki RiverNature4.5 kmMurayama ReservoirNature8.2 kmMount KumotoriMountain38 kmImonoki DokkeMountain38 kmMount ShiraiwaMountain38 kmMount NanatsuishiMountain37 kmMount TakanosuMountain32 kmMount Ohira, SaitamaMountain30 kmShōfuku-ji TempleMonument10 kmYamaguchi ReservoirMonument5.8 kmTakiyama CastleMonument13 kmShowa Retro Packaging MuseumMonument10 kmKoma Village Stone Age Dwelling SiteMonument9.3 kmKawagoekanMonument15 kmKoma Family ResidenceMonument9.9 kmKomagō Old Traditional HouseMonument9.2 kmSayama City MuseumMuseum3.9 kmIruma City MuseumMuseum1.8 kmSaitama Midori-no-mori Nature ParkMuseum3.8 kmNational Institute of Polar ResearchMuseum12 kmOme Railway ParkMuseum9.9 kmStationStation2.3 kmStationStation3.2 kmStationStation3.4 kmHachiōjiPlace18 kmKawagoePlace15 kmHigashimurayamaPlace11 kmMusashinoPlace21 kmKokubunjiPlace16 kmNishitōkyō-shiPlace19 km
Postal codes
358-8501358-8510358-8511358-8515358-8521358-8555358-8558358-8585358-8588
Getting to Iruma
Tokyo Haneda International AirportHND
48 kmNarita International AirportNRT
92 kmIbaraki AirportIBR
102 km仏子Railway station
2.3 km元加治Railway station
3.2 km入間市Railway station
3.4 kmPlaces near Iruma
Places with a climate like Iruma
Matched month by month on temperature, rain and sunshine.
Frequently asked questions
When is the best time to visit Iruma?
Based on 30-year climate normals, April, October and November offer the best balance of comfortable temperatures, low rainfall and sunshine in Iruma.
What is the hottest month in Iruma?
August is the warmest month, with average highs of 29°C and lows of 22°C.
What is the coldest month in Iruma?
January is the coldest month, with average highs of 7°C and lows of -2°C.
What is the rainiest month in Iruma?
July is the wettest month with about 165 mm of precipitation on 22 wet days.
What is the postal code of Iruma?
Iruma has 9 postal codes: 358-8501, 358-8510, 358-8511, 358-8515, 358-8521, 358-8555, 358-8558, 358-8585, 358-8588.