Climate averages 1991–2020
Muroran weather
in April.
A cold, moderately wet month: the 7th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cold month in Muroran: daytime highs average 7.5°C and nights cool to about 1.3°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 76 mm of rain on roughly 9 days, which makes April a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 20 min on an average April day.
The nearest other city in this atlas is Tomakomai (62 km away). In April its highs average 7.5°C, about as warm as Muroran, with 78 mm of rain.
Among the 303 cities listed in Japan, Muroran ranks joint 300th of 303 for the warmest April highs and joint 8th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Muroran is 9.2°C cooler than that mean.
From April to May, average highs rise by 5.6°C to 13.2°C, and monthly rainfall rises from 76 mm to 112 mm.
The annual picture
April in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Muroran climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.0°C-6.8°C | -6.8°C | 51 | 8.5 | 9.59 h |
| February | -1.4°C-6.3°C | -6.3°C | 44 | 7.4 | 10.511 h |
| March | 2.0°C-3.4°C | -3.4°C | 57 | 9.1 | 11.912 h |
| April, selected | 7.5°C1.3°C | 1.3°C | 76 | 9.1 | 13.313 h |
| May | 13.2°C7.0°C | 7.0°C | 112 | 11.1 | 14.615 h |
| June | 17.4°C12.2°C | 12.2°C | 104 | 10.3 | 15.215 h |
| July | 21.3°C16.7°C | 16.7°C | 153 | 13.0 | 14.915 h |
| August | 23.0°C18.7°C | 18.7°C | 181 | 12.6 | 13.914 h |
| September | 20.2°C15.6°C | 15.6°C | 166 | 13.0 | 12.513 h |
| October | 14.1°C8.9°C | 8.9°C | 103 | 10.9 | 11.111 h |
| November | 6.7°C1.9°C | 1.9°C | 80 | 11.0 | 9.810 h |
| December | 0.3°C-4.2°C | -4.2°C | 69 | 11.0 | 9.19 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Tomakomai in AprilJapan · 62 kmHigh 7.5°C · Low 1.0°C · 78 mm rain
- Hakodate in AprilJapan · 64 kmHigh 8.9°C · Low 2.4°C · 83 mm rain
- Chitose in AprilJapan · 78 kmHigh 8.8°C · Low 0.6°C · 70 mm rain
- Eniwa in AprilJapan · 80 kmHigh 9.1°C · Low 0.0°C · 66 mm rain
- Sapporo in AprilJapan · 88 kmHigh 9.2°C · Low -0.1°C · 73 mm rain
- Otaru in AprilJapan · 97 kmHigh 7.3°C · Low 1.4°C · 66 mm rain
- Ebetsu in AprilJapan · 99 kmHigh 9.4°C · Low -0.1°C · 66 mm rain
- Iwamizawa in AprilJapan · 117 kmHigh 9.5°C · Low 0.1°C · 67 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Muroran) is explained once on the Muroran year overview and on the Sources, method and limits page.