Climate · Japan

Tomamu

Warm and wet from June to September; cold and wet from December to March.

Typical weather, averaged over 30 years43.1°N620 m above the sea
  1. Jan22°-6°6°-14°Rain on about four days a week.
  2. Feb24°-4°8°-13°Rain on about four days a week.
  3. Mar32°0°16°-9°Rain on about four days a week.
  4. Apr44°7°27°-3°Rain on about four days a week.
  5. May58°14°39°4°Rain on about three days a week.
  6. Jun67°19°50°10°Rain on about three days a week.
  7. Jul73°23°58°14°Rain on about four days a week.
  8. Aug75°24°60°16°Rain on about four days a week.
  9. Sep68°20°52°11°Rain on about three days a week.
  10. Oct57°14°41°5°Rain on about three days a week.
  11. Nov42°6°27°-3°Rain on about four days a week.
  12. Dec27°-3°11°-12°Rain on about four days a week.
Each month: its typical high and low, and dots for wet days a week. Tap a month to open it.The best months

The warm season runs from June to September, with highs near 71°F and nights near 55°F. From December to March, highs stay near or below freezing, around 26°F. Rain or snow falls on about four days a week, spread through the year. Daylight runs from about 9 hours in December to 15½ hours in June.The warm season runs from June to September, with highs near 22°C and nights near 13°C. From December to March, highs stay near or below freezing, around -3°C. Rain or snow falls on about four days a week, spread through the year. Daylight runs from about 9 hours in December to 15½ hours in June.

Where Tomamu sits

Asia/Tokyo

this place
typical high in Januarytypical high in Februarytypical high in Marchtypical high in Apriltypical high in Maytypical high in Junetypical high in Julytypical high in Augusttypical high in Septembertypical high in Octobertypical high in Novembertypical high in December 40°F4°C95°F35°C
Latitude
43.1°Nnorthern hemisphere
Above the sea
620 mupland
Sunrise, mid-JanuarySunrise, mid-FebruarySunrise, mid-MarchSunrise, mid-AprilSunrise, mid-MaySunrise, mid-JuneSunrise, mid-JulySunrise, mid-AugustSunrise, mid-SeptemberSunrise, mid-OctoberSunrise, mid-NovemberSunrise, mid-December
6:58 AM6:29 AM5:44 AM4:49 AM4:07 AM3:49 AM4:03 AM4:34 AM5:08 AM5:41 AM6:21 AM6:54 AMsets 4:18 PMsets 4:59 PMsets 5:35 PMsets 6:10 PMsets 6:44 PMsets 7:10 PMsets 7:08 PMsets 6:34 PMsets 5:42 PMsets 4:49 PMsets 4:07 PMsets 3:55 PM
Nearest of ours
Sapporo103 km west

The land around Tomamu, shaded by its typical high in January, the planning map's own layer.The land around Tomamu, shaded by its typical high in February, the planning map's own layer.The land around Tomamu, shaded by its typical high in March, the planning map's own layer.The land around Tomamu, shaded by its typical high in April, the planning map's own layer.The land around Tomamu, shaded by its typical high in May, the planning map's own layer.The land around Tomamu, shaded by its typical high in June, the planning map's own layer.The land around Tomamu, shaded by its typical high in July, the planning map's own layer.The land around Tomamu, shaded by its typical high in August, the planning map's own layer.The land around Tomamu, shaded by its typical high in September, the planning map's own layer.The land around Tomamu, shaded by its typical high in October, the planning map's own layer.The land around Tomamu, shaded by its typical high in November, the planning map's own layer.The land around Tomamu, shaded by its typical high in December, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Through the year

week by week

Temperature

Highs from 22°F in January to 75°F in August.Highs from -6°C in January to 24°C in August.

Chance of a wet day

Wettest in November and December (56% of days), driest in May and June (47%).

Cloud cover

Clearest in October (49% cover), cloudiest in January and February (72%).

Daylight

From 9h 03m in December to 15h 19m in June.

Week by week, lightly smoothed. Shading marks the seasons; the olive line, the best months. Hover or tap a week for its figures.

Month by month

°F°C

Tomamu, month by month: the typical high and low, wet days a week, cloud cover and daylight.
MonthTypical low to highWet days a weekCloudDaylight
JanuaryBelow freezing
6°-14°22°-6°
4 days72%9h 23m
FebruaryBelow freezing
8°-13°24°-4°
4 days72%10h 27m
MarchBelow freezing
16°-9°32°0°
4 days63%11h 51m
April
27°-3°44°7°
4 days57%13h 22m
May
39°4°58°14°
3 days59%14h 39m
JuneWarm season
50°10°67°19°
3 days59%15h 19m
JulyWarm seasonAt its best
58°14°73°23°
4 days58%15h 00m
AugustWarm seasonAt its best
60°16°75°24°
4 days58%13h 52m
SeptemberWarm season
52°11°68°20°
3 days54%12h 24m
October
41°5°57°14°
3 days49%10h 54m
November
27°-3°42°6°
4 days60%9h 39m
DecemberBelow freezing
11°-12°27°-3°
4 days70%9h 03m

When is the best time to visit Tomamu?


The best months are July to August: highs near 74°F, nights near 59°F, and rain on about four days a week.The best months are July to August: highs near 23°C, nights near 15°C, and rain on about four days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

Questions


What is the warmest month in Tomamu?

August, with highs near 75°F and lows near 60°F. The coolest is January, with highs near 22°F.August, with highs near 24°C and lows near 16°C. The coolest is January, with highs near -6°C.

When does it rain most in Tomamu?

November and December, with rain or snow on about four days a week. May and June are the driest, with rain on about three days a week.

How long are the days in Tomamu?

From about 9 hours in December to 15½ hours in June.

When are the skies clearest in Tomamu?

October, when cloud covers about 49% of the sky on average. January and February are the cloudiest, at about 72%.

Places with a year like Tomamu's

by their highs, lows and wet days

Their highs, lows, wet days and cloud run closest to Tomamu's through the year, one place a country. “Six months apart”: their winter is Tomamu's summer.

Elsewhere in Japan

All of Japan

Where to stay

2 in our collection

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Tomamu. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.