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Nagasaki weather by month
Check out Nagasaki weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.
Temperature in Nagasaki (°C)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) | 9 |
10 |
14 |
19 |
23 |
26 |
29 |
31 |
28 |
23 |
17 |
12 |
| Min temperature (night-time) | 2 |
3 |
6 |
11 |
15 |
19 |
23 |
24 |
20 |
15 |
9 |
4 |
| Heat & Humidity | 0 |
0 |
0 |
0 |
0 |
L |
H |
VH |
M |
0 |
0 |
0 |
| Sea temperature | 17 |
16 |
16 |
17 |
19 |
22 |
25 |
27 |
26 |
24 |
21 |
19 |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
Sunshine & UV index in Nagasaki
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily hours of sunshine | ||||||||||||
| Daily hours of daylight | 10 |
11 |
12 |
13 |
14 |
14 |
14 |
13 |
12 |
11 |
10 |
10 |
| UV Index (Maximum) | 3 |
5 |
7 |
9 |
10 |
10 |
11 |
11 |
9 |
6 |
4 |
3 |
Rainfall in Nagasaki
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain | 21 |
19 |
19 |
17 |
16 |
19 |
20 |
17 |
17 |
13 |
15 |
19 |
| Average monthly rainfall (mm) | 86 |
94 |
142 |
191 |
214 |
362 |
361 |
205 |
201 |
103 |
92 |
71 |
More about Nagasaki
Nagasaki by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Japan
The climate guide for Japan (Nagasaki) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
What's the climate like in Nagasaki?
Nagasaki has a temperate climate with hot summers and some rainfall in all months.
Nagasaki weather in January
Expect daytime maximum temperatures of 9°C in Nagasaki, Japan in January based on long-term weather averages. There are 3 hours of sunshine per day on average with 21 days with some rainfall and typically 86 mm of rainfall in the month.
- 9°C max day temperature
9 - 3 hours of sunshine per day
- 21 days with some rainfall
21 - 2°C min night temperature
2 - 10 hours of daylight per day
10 - No heat & humidity
0 - 86 mm of monthly rainfall
86 - 3 (Moderate) UV index
3 - 17°C sea temperature
17
Nagasaki weather in February
Expect daytime maximum temperatures of 10°C in Nagasaki, Japan in February based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 94 mm of rainfall in the month.
- 10°C max day temperature
10 - 4 hours of sunshine per day
- 19 days with some rainfall
19 - 3°C min night temperature
3 - 11 hours of daylight per day
11 - No heat & humidity
0 - 94 mm of monthly rainfall
94 - 5 (Moderate) UV index
5 - 16°C sea temperature
16
Nagasaki weather in March
Expect daytime maximum temperatures of 14°C in Nagasaki, Japan in March based on long-term weather averages. There are 5 hours of sunshine per day on average with 19 days with some rainfall and typically 142 mm of rainfall in the month.
- 14°C max day temperature
14 - 5 hours of sunshine per day
- 19 days with some rainfall
19 - 6°C min night temperature
6 - 12 hours of daylight per day
12 - No heat & humidity
0 - 142 mm of monthly rainfall
142 - 7 (High) UV index
7 - 16°C sea temperature
16
Nagasaki weather in April
Expect daytime maximum temperatures of 19°C in Nagasaki, Japan in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 17 days with some rainfall and typically 191 mm of rainfall in the month.
- 19°C max day temperature
19 - 5 hours of sunshine per day
- 17 days with some rainfall
17 - 11°C min night temperature
11 - 13 hours of daylight per day
13 - No heat & humidity
0 - 191 mm of monthly rainfall
191 - 9 (Very High) UV index
9 - 17°C sea temperature
17
Nagasaki weather in May
Expect daytime maximum temperatures of 23°C in Nagasaki, Japan in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 214 mm of rainfall in the month.
- 23°C max day temperature
23 - 6 hours of sunshine per day
- 16 days with some rainfall
16 - 15°C min night temperature
15 - 14 hours of daylight per day
14 - No heat & humidity
0 - 214 mm of monthly rainfall
214 - 10 (Very High) UV index
10 - 19°C sea temperature
19
Nagasaki weather in June
Expect daytime maximum temperatures of 26°C in Nagasaki, Japan in June based on long-term weather averages. There are 5 hours of sunshine per day on average with 19 days with some rainfall and typically 362 mm of rainfall in the month.
- 26°C max day temperature
26 - 5 hours of sunshine per day
- 19 days with some rainfall
19 - 19°C min night temperature
19 - 14 hours of daylight per day
14 - Low heat & humidity
L - 362 mm of monthly rainfall
362 - 10 (Very High) UV index
10 - 22°C sea temperature
22
Nagasaki weather in July
Expect daytime maximum temperatures of 29°C in Nagasaki, Japan in July and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 20 days with some rainfall and typically 361 mm of rainfall in the month.
- 29°C max day temperature
29 - 6 hours of sunshine per day
- 20 days with some rainfall
20 - 23°C min night temperature
23 - 14 hours of daylight per day
14 - High heat & humidity
H - 361 mm of monthly rainfall
361 - 11 (Extreme) UV index
11 - 25°C sea temperature
25
Nagasaki weather in August
Expect daytime maximum temperatures of 31°C in Nagasaki, Japan in August and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 17 days with some rainfall and typically 205 mm of rainfall in the month.
- 31°C max day temperature
31 - 7 hours of sunshine per day
- 17 days with some rainfall
17 - 24°C min night temperature
24 - 13 hours of daylight per day
13 - Very High heat & humidity
VH - 205 mm of monthly rainfall
205 - 11 (Extreme) UV index
11 - 27°C sea temperature
27
Nagasaki weather in September
Expect daytime maximum temperatures of 28°C in Nagasaki, Japan in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 17 days with some rainfall and typically 201 mm of rainfall in the month.
- 28°C max day temperature
28 - 6 hours of sunshine per day
- 17 days with some rainfall
17 - 20°C min night temperature
20 - 12 hours of daylight per day
12 - Moderate heat & humidity
M - 201 mm of monthly rainfall
201 - 9 (Very High) UV index
9 - 26°C sea temperature
26
Nagasaki weather in October
Expect daytime maximum temperatures of 23°C in Nagasaki, Japan in October based on long-term weather averages. There are 6 hours of sunshine per day on average with 13 days with some rainfall and typically 103 mm of rainfall in the month.
- 23°C max day temperature
23 - 6 hours of sunshine per day
- 13 days with some rainfall
13 - 15°C min night temperature
15 - 11 hours of daylight per day
11 - No heat & humidity
0 - 103 mm of monthly rainfall
103 - 6 (High) UV index
6 - 24°C sea temperature
24
Nagasaki weather in November
Expect daytime maximum temperatures of 17°C in Nagasaki, Japan in November based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 92 mm of rainfall in the month.
- 17°C max day temperature
17 - 5 hours of sunshine per day
- 15 days with some rainfall
15 - 9°C min night temperature
9 - 10 hours of daylight per day
10 - No heat & humidity
0 - 92 mm of monthly rainfall
92 - 4 (Moderate) UV index
4 - 21°C sea temperature
21
Nagasaki weather in December
Expect daytime maximum temperatures of 12°C in Nagasaki, Japan in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 71 mm of rainfall in the month.
- 12°C max day temperature
12 - 4 hours of sunshine per day
- 19 days with some rainfall
19 - 4°C min night temperature
4 - 10 hours of daylight per day
10 - No heat & humidity
0 - 71 mm of monthly rainfall
71 - 3 (Moderate) UV index
3 - 19°C sea temperature
19
More about Nagasaki
Nagasaki by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Japan
- Explore latest offers on Fred Olsen Cruises in 2026/2027
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- Filter offers by price, destination, ship & departure point
The climate guide for Japan (Nagasaki) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Tropical storm risk: Nagasaki, Japan typhoon season
Compare Nagasaki weather with the UK
The weather chart below compares the average monthly maximum daytime temperature for Nagasaki, Japan and the UK (London).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
More about Japan
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