Aira in Winter
In winter (December, January and February), Aira sees average daytime highs around 13°C and overnight lows near 6°C, with 272 mm of rain over about 27 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 13°C. The sky is clear or mostly clear about 28% of the time across winter, and the air most often feels dry.
Winter is Aira's weakest season of the year to visit on our travel score. For the whole year in context, see Aira's year-round climate.
- Avg daytime high
- 13°C
- coldest season of the year
- Avg overnight low
- 6°C
- Rainfall
- 272 mm
- 27 wet days
- Avg wind
- 11 km/h
- Travel score
- 3.5
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Aira in Winter
Across winter, daytime highs hold fairly steady around 13°C.
A typical winter day in Aira reaches about 13°C and drops to 6°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in Aira
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Aira weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 11° / 5° | 81 | 9.6 | 10.2 | 2.9 |
| Feb | 13° / 6° | 104 | 9.7 | 10.8 | 3.3 |
| Mar | 16° / 8° | 153 | 12.9 | 11.8 | 4.5 |
| Apr | 20° / 12° | 182 | 11.5 | 12.8 | 5.9 |
| May | 24° / 16° | 205 | 11.7 | 13.6 | 6.4 |
| Jun | 26° / 21° | 514 | 19.4 | 14 | 4.9 |
| Jul | 30° / 25° | 336 | 20 | 13.9 | 3.9 |
| Aug | 31° / 25° | 173 | 17.5 | 13.2 | 3.8 |
| Sep | 29° / 23° | 197 | 14.5 | 12.2 | 5.2 |
| Oct | 24° / 17° | 108 | 8.6 | 11.2 | 7.2 |
| Nov | 19° / 12° | 111 | 8.7 | 10.4 | 6.3 |
| Dec | 14° / 7° | 87 | 7.9 | 10 | 4.2 |
Cloud cover in Winter
The sky is clear or mostly clear about 28% of the time across winter.
Chance of precipitation in Winter
Aira gets around 272 mm of rain over 27 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 11 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 06 min in early December to 11 h 12 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 2.8 kWh/m².
Hazard calendar for Aira
In winter, Aira overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Aira sits in the Pacific typhoon belt; the season peaks July–October.
Aira's rainy season runs June–July, when most of the year's rain falls.
Is winter a good time to visit Aira?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Aira.
What to pack for Aira in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Aira sees daytime highs around 13°C and nights near 6°C. Pack a warm layer. Worth having: rain gear. About 27 days see rain.
Sea temperature near Aira in Winter
The nearest coast averages about 18°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 44 km away) is warmest in August at about 28°C and coldest in February near 16°C.
It's comfortable for a long swim from May 16 to Dec 4 — about 6.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 17 | 16 | 17 | 18 | 20 | 23 | 26 | 28 | 27 | 24 | 22 | 19 |
| Comfort | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Warm | Warm | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 17 | Cool |
| Feb | 16 | Cool |
| Mar | 17 | Cool |
| Apr | 18 | Cool |
| May | 20 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 26 | Warm |
| Aug | 28 | Warm |
| Sep | 27 | Warm |
| Oct | 24 | Warm |
| Nov | 22 | Refreshing |
| Dec | 19 | Cool |
UV index in Aira in Winter
Clear-sky midday UV across winter averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Aira peaks around July 10 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 7 | 8 | 8 | 11 | 11 | 9 | 10 | 6 | 5 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 7 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 3 | Moderate |
Air quality in Aira in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Aira is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 15 | 19 | 22 | 23 | 21 | 17 | 12 | 14 | 12 | 12 | 14 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 19 | Moderate |
| Mar | 22 | Moderate |
| Apr | 23 | Moderate |
| May | 21 | Moderate |
| Jun | 17 | Moderate |
| Jul | 12 | Moderate |
| Aug | 14 | Moderate |
| Sep | 12 | Moderate |
| Oct | 12 | Moderate |
| Nov | 14 | Moderate |
| Dec | 13 | Moderate |
Where is Aira?
Aira sits at 31.8°N, 130.6°E, 76 m above sea level, in Japan. The nearest listed city is Kajiki, 8.0 km away.
Topography around Aira
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Aira.
Within 3 km, the terrain around Aira has significant variations in elevation — a maximum elevation change of 271 m around an average of 87 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 694 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,683 m.
The land around Aira is covered by trees (74%) within 3 km, trees (74%) within 16 km, and trees (55%) and water (37%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Aira (31.7743°, 130.5921°, elevation 76 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.