Climate averages 1991–2020
Hitachi weather
in December.
A cool, moderately wet month: the 10th warmest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Hitachi: daytime highs average 9.7°C and nights cool to about 3.9°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 72 mm of rain on roughly 9 days, which makes December a moderately wet month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 9 h 43 min on an average December day.
The nearest other city in this atlas is Hitachi-Naka (25 km away). In December its highs average 10.1°C, about as warm as Hitachi, with 64 mm of rain.
Among the 303 cities listed in Japan, Hitachi ranks joint 205th of 303 for the warmest December highs and joint 191st of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Hitachi is 0.2°C warmer than that mean.
From December to January, average highs fall by 2.4°C to 7.3°C, and monthly rainfall rises from 72 mm to 73 mm.
The annual picture
December in context
Monthly rainfall
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
Hitachi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.3°C1.3°C | 1.3°C | 73 | 8.1 | 10.010 h |
| February | 7.9°C1.2°C | 1.2°C | 72 | 8.3 | 10.811 h |
| March | 11.1°C3.5°C | 3.5°C | 127 | 12.7 | 11.912 h |
| April | 15.8°C7.8°C | 7.8°C | 125 | 12.0 | 13.113 h |
| May | 20.0°C12.9°C | 12.9°C | 144 | 12.5 | 14.114 h |
| June | 22.9°C17.3°C | 17.3°C | 148 | 14.3 | 14.615 h |
| July | 26.4°C21.3°C | 21.3°C | 162 | 14.1 | 14.414 h |
| August | 27.8°C22.9°C | 22.9°C | 111 | 11.4 | 13.614 h |
| September | 24.7°C20.1°C | 20.1°C | 174 | 14.1 | 12.412 h |
| October | 19.8°C14.8°C | 14.8°C | 211 | 13.2 | 11.311 h |
| November | 14.8°C9.0°C | 9.0°C | 108 | 10.1 | 10.310 h |
| December, selected | 9.7°C3.9°C | 3.9°C | 72 | 8.7 | 9.710 h |
Rainfall is the average of the 30 separate monthly totals. A rain 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
December in nearby cities
- Hitachi-Naka in DecemberJapan · 25 kmHigh 10.1°C · Low 3.8°C · 64 mm rain
- Mito in DecemberJapan · 33 kmHigh 10.0°C · Low 2.6°C · 71 mm rain
- Kasama, Japan in DecemberJapan · 42 kmHigh 9.0°C · Low 1.0°C · 56 mm rain
- Iwaki in DecemberJapan · 54 kmHigh 9.4°C · Low 3.5°C · 73 mm rain
- Ishioka in DecemberJapan · 58 kmHigh 10.3°C · Low 2.5°C · 60 mm rain
- Mooka in DecemberJapan · 60 kmHigh 9.8°C · Low 0.0°C · 49 mm rain
- Ōtawara in DecemberJapan · 62 kmHigh 8.1°C · Low -0.3°C · 51 mm rain
- Nasushiobara in DecemberJapan · 67 kmHigh 7.3°C · Low -0.2°C · 60 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 Hitachi) is explained once on the Hitachi year overview and on the Sources, method and limits page.