Aomori climate
Aomori (Japan) has a hot-summer humid continental climate (Köppen Dfa). The average temperature over the year is 11 °C51 °F, and about 1,412 mm56 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Aomori climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 134 | −228 | 031 | 1144.5 | 27 |
| Feb | 235 | −228 | 031 | 873.4 | 25 |
| Mar | 542 | 032 | 337 | 843.3 | 17 |
| Apr | 1152 | 439 | 846 | 843.3 | 2 |
| May | 1762 | 948 | 1355 | 893.5 | 0 |
| Jun | 2170 | 1457 | 1763 | 893.5 | 0 |
| Jul | 2576 | 1865 | 2170 | 1475.8 | 0 |
| Aug | 2679 | 2068 | 2374 | 1616.3 | 0 |
| Sep | 2373 | 1763 | 2068 | 1425.6 | 0 |
| Oct | 1763 | 1152 | 1457 | 1295.1 | 0 |
| Nov | 1050 | 541 | 846 | 1395.5 | 2 |
| Dec | 439 | 032 | 235 | 1465.8 | 18 |
| Year | 2679 | −228 | 1151 | 1,41256 | 90 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 84% | 87% | 1.3 | 9:33 |
| Feb | 82% | 84% | 2.0 | 10:35 |
| Mar | 79% | 78% | 3.2 | 11:49 |
| Apr | 79% | 71% | 4.4 | 13:15 |
| May | 82% | 70% | 5.0 | 14:26 |
| Jun | 84% | 73% | 5.1 | 15:05 |
| Jul | 86% | 78% | 4.5 | 14:49 |
| Aug | 84% | 71% | 4.4 | 13:47 |
| Sep | 80% | 69% | 3.8 | 12:24 |
| Oct | 78% | 67% | 2.8 | 11:02 |
| Nov | 81% | 76% | 1.7 | 9:50 |
| Dec | 84% | 84% | 1.2 | 9:15 |
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 Aomori is like
The warmest month is August, with an average high of 26 °C79 °F and a low of 20 °C68 °F. The coldest is January, when highs average 1 °C34 °F and lows −2 °C28 °F. Seasons are strongly marked: the warmest month is on average 23.7 °C42.7 °F warmer than the coldest.
It is wet, with about 1,412 mm56 in of precipitation per year. Rain is spread fairly evenly through the year. The wettest month is August (161 mm6.3 in), the driest is April (84 mm3.3 in).
Relative humidity ranges from 78% in October to 86% in July. The clearest skies (lowest average cloud amount, 67%) are typical of October. Average wind speed near the ground ranges from 7 km/h (5 mph) in July to 17 km/h (11 mph) in February. Daylight lasts from about 9.3 hours in December to 15.1 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 January, about 19 cm).
Best time to visit Aomori
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June: average highs of 21 °C70 °F to 21 °C70 °F with 89 mm3.5 in to 89 mm3.5 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 1 °C34 °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 Aomori
- Winter (December–February) — highs 134 to 4 °C39 °F, lows −228 to 0 °C32 °F, about 116 mm4.6 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots, shoes with good grip, as frost is common and an umbrella or light rain jacket.
- Spring (March–May) — highs 542 to 17 °C62 °F, lows 032 to 9 °C48 °F, about 86 mm3.4 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2170 to 26 °C79 °F, lows 1457 to 20 °C68 °F, about 132 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 1050 to 23 °C73 °F, lows 541 to 17 °C63 °F, about 137 mm5.4 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an umbrella or light rain jacket.
How Aomori compares
Compared with Akita, about 133 km to the southwest, Aomori is on average 1.7 °C3 °F cooler and receives 12% less precipitation (1,412 mm56 in vs 1,596 mm63 in). The difference is largest in December (2.3 °C4.1 °F cooler).
Of the 111 places in Japan covered by World Climates, Aomori is the 100th warmest by annual mean temperature and the 91st 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: New Bedford (United States, Cfb), Bridgeport (United States, Cfa) and Providence (United States, Dfa).
Nearby places
- Hirosaki 33 km · 10 °C51 °F · 1,478 mm58 in
- Hachinohe 74 km · 10 °C51 °F · 1,267 mm50 in
- Hakodate 107 km · 10 °C49 °F · 1,202 mm47 in
- Morioka 129 km · 10 °C50 °F · 1,384 mm54 in
- Akita 133 km · 12 °C54 °F · 1,596 mm63 in
- Oshu 190 km · 11 °C52 °F · 1,411 mm56 in
- Ichinoseki 214 km · 11 °C52 °F · 1,411 mm56 in
- Tomakomai 215 km · 9 °C48 °F · 1,226 mm48 in
Frequently asked questions
What is the warmest month in Aomori?
August is the warmest month in Aomori, with an average high of 26 °C (79 °F) and an average low of 20 °C (68 °F).
What is the coldest month in Aomori?
January is the coldest month, with an average high of 1 °C (34 °F) and an average low of -2 °C (28 °F).
When does it rain the most in Aomori?
August is the wettest month with about 161 mm (6.3 in) of precipitation; April is the driest with about 84 mm (3.3 in).
What is the best time to visit Aomori?
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 70 m, while Aomori lies at about 7 m. Temperatures on this page were therefore adjusted by +0.4 °C0.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.