Hachinohe climate
Hachinohe (Japan) has a hot-summer humid continental climate (Köppen Dfa). The average temperature over the year is 10 °C51 °F, and about 1,267 mm50 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Hachinohe climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 133 | −424 | −229 | 873.4 |
| Feb | 134 | −424 | −229 | 662.6 |
| Mar | 542 | −130 | 236 | 813.2 |
| Apr | 1254 | 338 | 846 | 833.3 |
| May | 1865 | 949 | 1457 | 863.4 |
| Jun | 2373 | 1457 | 1865 | 933.6 |
| Jul | 2679 | 1865 | 2272 | 1505.9 |
| Aug | 2781 | 2068 | 2474 | 1515.9 |
| Sep | 2474 | 1661 | 2068 | 1395.5 |
| Oct | 1763 | 949 | 1356 | 1234.8 |
| Nov | 1051 | 438 | 744 | 1014.0 |
| Dec | 338 | −229 | 134 | 1094.3 |
| Year | 2781 | −424 | 1051 | 1,26750 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 91% | 74% | 1.6 | 9:35 |
| Feb | 89% | 73% | 2.4 | 10:36 |
| Mar | 84% | 68% | 3.5 | 11:50 |
| Apr | 80% | 64% | 4.5 | 13:14 |
| May | 80% | 67% | 5.0 | 14:25 |
| Jun | 83% | 73% | 4.9 | 15:03 |
| Jul | 86% | 80% | 4.3 | 14:47 |
| Aug | 84% | 73% | 4.1 | 13:46 |
| Sep | 84% | 68% | 3.7 | 12:24 |
| Oct | 83% | 62% | 2.9 | 11:03 |
| Nov | 86% | 66% | 1.9 | 9:52 |
| Dec | 89% | 72% | 1.4 | 9:17 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Hachinohe is like
The warmest month is August, with an average high of 27 °C81 °F and a low of 20 °C68 °F. The coldest is January, when highs average 1 °C33 °F and lows −4 °C24 °F. Seasons are strongly marked: the warmest month is on average 25.4 °C45.7 °F warmer than the coldest.
It is wet, with about 1,267 mm50 in of precipitation per year. The wettest three-month stretch is July–September, which brings 35% of the annual total. The wettest month is August (151 mm5.9 in), the driest is February (66 mm2.6 in).
Relative humidity ranges from 80% in April to 91% in January. The clearest skies (lowest average cloud amount, 62%) are typical of October. Average wind speed near the ground ranges from 7 km/h (4 mph) in July to 15 km/h (9 mph) in February. Daylight lasts from about 9.3 hours in December to 15.0 hours in June.
A lasting snow cover is typical in December–March, when the average snow depth in the reanalysis exceeds 10 cm (deepest in February, about 23 cm).
Best time to visit Hachinohe
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June: average highs of 23 °C73 °F to 23 °C73 °F with 93 mm3.6 in to 93 mm3.6 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 1 °C33 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Hachinohe
- Winter (December–February) — highs 133 to 3 °C38 °F, lows −424 to −2 °C29 °F, about 87 mm3.4 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
- Spring (March–May) — highs 542 to 18 °C65 °F, lows −130 to 9 °C49 °F, about 83 mm3.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2373 to 27 °C81 °F, lows 1457 to 20 °C68 °F, about 131 mm5.2 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Autumn (September–November) — highs 1051 to 24 °C74 °F, lows 438 to 16 °C61 °F, about 121 mm4.8 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an umbrella or light rain jacket.
How Hachinohe compares
Compared with Aomori, about 74 km to the northwest, Hachinohe has practically the same average temperature and receives 10% less precipitation (1,267 mm50 in vs 1,412 mm56 in). The difference is largest in January (1.4 °C2.5 °F cooler).
Of the 111 places in Japan covered by World Climates, Hachinohe is the 101st warmest by annual mean temperature and the 105th wettest by annual precipitation. See all of them on the Japan climate page.
Places in other countries with the most similar temperature and rainfall pattern: Providence (United States, Dfa), Waterbury (United States, Dfa) and Boston (United States, Dfa).
Nearby places
- Aomori 74 km · 11 °C51 °F · 1,412 mm56 in
- Hirosaki 87 km · 10 °C51 °F · 1,478 mm58 in
- Morioka 94 km · 10 °C50 °F · 1,384 mm54 in
- Akita 146 km · 12 °C54 °F · 1,596 mm63 in
- Oshu 154 km · 11 °C52 °F · 1,411 mm56 in
- Hakodate 156 km · 10 °C49 °F · 1,202 mm47 in
- Ichinoseki 179 km · 11 °C52 °F · 1,411 mm56 in
- Ōsaki 217 km · 12 °C54 °F · 1,316 mm52 in
Frequently asked questions
What is the warmest month in Hachinohe?
August is the warmest month in Hachinohe, with an average high of 27 °C (81 °F) and an average low of 20 °C (68 °F).
What is the coldest month in Hachinohe?
January is the coldest month, with an average high of 1 °C (33 °F) and an average low of -4 °C (24 °F).
When does it rain the most in Hachinohe?
August is the wettest month with about 151 mm (5.9 in) of precipitation; February is the driest with about 66 mm (2.6 in).
What is the best time to visit Hachinohe?
Judging by long-term averages, the most comfortable months are June.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 278 m, while Hachinohe lies at about 20 m. Temperatures on this page were therefore adjusted by +1.7 °C3 °F using the standard lapse rate of 6.5 °C per 1,000 m.