Iida climate
Iida (Japan) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 13 °C56 °F, and about 1,586 mm62 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Iida climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 540 | −425 | 033 | 592.3 |
| Feb | 644 | −327 | 235 | 722.8 |
| Mar | 1051 | 133 | 542 | 1154.5 |
| Apr | 1661 | 642 | 1152 | 1305.1 |
| May | 2271 | 1152 | 1762 | 1435.6 |
| Jun | 2577 | 1661 | 2169 | 1716.7 |
| Jul | 2983 | 2169 | 2576 | 2198.6 |
| Aug | 2985 | 2170 | 2578 | 1566.1 |
| Sep | 2679 | 1864 | 2271 | 1947.6 |
| Oct | 2069 | 1153 | 1661 | 1837.2 |
| Nov | 1457 | 541 | 1049 | 803.2 |
| Dec | 846 | 031 | 438 | 632.5 |
| Year | 2985 | −425 | 1356 | 1,58662 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 88% | 61% | 2.5 | 10:00 |
| Feb | 86% | 62% | 3.2 | 10:51 |
| Mar | 83% | 62% | 4.1 | 11:52 |
| Apr | 80% | 65% | 4.9 | 13:03 |
| May | 80% | 69% | 5.4 | 14:01 |
| Jun | 84% | 82% | 4.8 | 14:33 |
| Jul | 87% | 78% | 4.8 | 14:20 |
| Aug | 86% | 70% | 5.0 | 13:29 |
| Sep | 87% | 72% | 4.1 | 12:21 |
| Oct | 86% | 65% | 3.4 | 11:13 |
| Nov | 87% | 57% | 2.7 | 10:14 |
| Dec | 88% | 60% | 2.2 | 9:46 |
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 Iida is like
The warmest month is August, with an average high of 29 °C85 °F and a low of 21 °C70 °F. The coldest is January, when highs average 5 °C40 °F and lows −4 °C25 °F. Seasons are strongly marked: the warmest month is on average 25 °C45.1 °F warmer than the coldest.
It is wet, with about 1,586 mm62 in of precipitation per year. The wettest three-month stretch is July–September, which brings 36% of the annual total. The wettest month is July (219 mm8.6 in), the driest is January (59 mm2.3 in).
Relative humidity ranges from 80% in May to 88% in January. The clearest skies (lowest average cloud amount, 57%) are typical of November. Average wind speed near the ground ranges from 5 km/h (3 mph) in August to 9 km/h (6 mph) in January. Daylight lasts from about 9.8 hours in December to 14.5 hours in June.
Best time to visit Iida
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May: average highs of 22 °C71 °F to 22 °C71 °F with 143 mm5.6 in to 143 mm5.6 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 5 °C40 °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 Iida
- Winter (December–February) — highs 540 to 8 °C46 °F, lows −425 to 0 °C31 °F, about 65 mm2.5 in of precipitation a month. Pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1051 to 22 °C71 °F, lows 133 to 11 °C52 °F, about 129 mm5.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Summer (June–August) — highs 2577 to 29 °C85 °F, lows 1661 to 21 °C70 °F, about 182 mm7.2 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 1457 to 26 °C79 °F, lows 541 to 18 °C64 °F, about 153 mm6.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Iida compares
Compared with Tajimi, about 66 km to the west, Iida is on average 1.1 °C1.9 °F cooler and receives 12% less precipitation (1,586 mm62 in vs 1,803 mm71 in). The difference is largest in January (1.4 °C2.5 °F cooler).
Of the 111 places in Japan covered by World Climates, Iida is the 85th warmest by annual mean temperature and the 66th 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: Atlantic City (United States, Cfa), Washington (United States, Cfa) and Baltimore (United States, Dfa).
Nearby places
- Tajimi 66 km · 14 °C58 °F · 1,803 mm71 in
- Kofu 69 km · 14 °C58 °F · 1,598 mm63 in
- Toyota 78 km · 16 °C60 °F · 1,741 mm69 in
- Shizuoka 79 km · 16 °C61 °F · 1,875 mm74 in
- Matsumoto 80 km · 12 °C54 °F · 1,329 mm52 in
- Okazaki 87 km · 16 °C60 °F · 1,741 mm69 in
- Fuji 88 km · 17 °C63 °F · 1,887 mm74 in
- Nagoya 91 km · 16 °C61 °F · 1,741 mm69 in
Frequently asked questions
What is the warmest month in Iida?
August is the warmest month in Iida, with an average high of 29 °C (85 °F) and an average low of 21 °C (70 °F).
What is the coldest month in Iida?
January is the coldest month, with an average high of 5 °C (40 °F) and an average low of -4 °C (25 °F).
When does it rain the most in Iida?
July is the wettest month with about 219 mm (8.6 in) of precipitation; January is the driest with about 59 mm (2.3 in).
What is the best time to visit Iida?
Judging by long-term averages, the most comfortable months are May.
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 1,369 m, while Iida lies at about 517 m. Temperatures on this page were therefore adjusted by +5.5 °C10 °F using the standard lapse rate of 6.5 °C per 1,000 m.