Hamamatsu weather in April
In April, Hamamatsu sees average daytime highs of 19°C and overnight lows near 10°C, with 165 mm of rain across 11.1 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.
Highs climb over the month, from about 17°C in the first days to 21°C by the end. The sky is clear or mostly clear about 35% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 18 min at the start of April to 13 h 18 min by month's end. Set against the rest of the year, April is Hamamatsu's 7th-clearest and 5th-windiest month. For the whole year in context, see Hamamatsu's year-round climate.
- Daytime high
- 19°
- 7th warmest
- Overnight low
- 10°
- 6th coldest
- Rainfall
- 165 mm
- 11.1 wet days
- Daylight
- 12 h 54 min
- 5:23 AM – 6:15 PM
- Cloud cover
- 58%
- 7th clearest
- Wind
- 13 km/h
- 5th windiest
- Solar energy
- 5.12 kWh/m²
- Travel score
- 5.9
- out of 10
- Air quality
- Good
- PM2.5 9 µg/m³ · 2010
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 17°C in the first days to 21°C by the end.
A typical April day in Hamamatsu reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 23°C. Set against its neighbours, April runs about 5°C warmer than March and about 4°C cooler than May.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 |
| Avg low (°C) | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 17 | 8 |
| 2 | 17 | 8 |
| 3 | 17 | 8 |
| 4 | 17 | 8 |
| 5 | 17 | 9 |
| 6 | 18 | 9 |
| 7 | 18 | 9 |
| 8 | 18 | 9 |
| 9 | 18 | 9 |
| 10 | 18 | 9 |
| 11 | 18 | 10 |
| 12 | 19 | 10 |
| 13 | 19 | 10 |
| 14 | 19 | 10 |
| 15 | 19 | 10 |
| 16 | 19 | 11 |
| 17 | 19 | 11 |
| 18 | 19 | 11 |
| 19 | 20 | 11 |
| 20 | 20 | 11 |
| 21 | 20 | 11 |
| 22 | 20 | 12 |
| 23 | 20 | 12 |
| 24 | 20 | 12 |
| 25 | 20 | 12 |
| 26 | 21 | 12 |
| 27 | 21 | 12 |
| 28 | 21 | 13 |
| 29 | 21 | 13 |
| 30 | 21 | 13 |
How April really feels in Hamamatsu
Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Hamamatsu weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 10° / 3° | 70 | 5.9 | 0.1 | 9.9 | 2.7 |
| Feb | 11° / 3° | 89 | 6.9 | 0.5 | 10.7 | 3.1 |
| Mar | 14° / 6° | 148 | 10.8 | 0.1 | 11.7 | 4.3 |
| Apr | 19° / 10° | 165 | 11.1 | 0 | 12.8 | 5.9 |
| May | 23° / 15° | 184 | 12 | 0 | 13.8 | 6.4 |
| Jun | 26° / 20° | 258 | 15.7 | 0 | 14.3 | 5.4 |
| Jul | 30° / 24° | 273 | 16.9 | 0 | 14.1 | 4.2 |
| Aug | 31° / 25° | 157 | 16.2 | 0 | 13.3 | 3.8 |
| Sep | 28° / 22° | 247 | 15.8 | 0 | 12.2 | 5.1 |
| Oct | 23° / 16° | 216 | 12.5 | 0 | 11.1 | 6.4 |
| Nov | 18° / 10° | 122 | 9.2 | 0 | 10.2 | 5.9 |
| Dec | 13° / 5° | 71 | 6.6 | 0 | 9.7 | 3.9 |
Cloud cover in April
The sky is clear or mostly clear about 35% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 52%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 52 | 52 | 52 | 51 | 51 | 51 | 51 | 50 | 51 | 51 | 50 | 49 | 49 | 48 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 45 | 46 | 45 | 45 | 45 | 44 | 44 |
| Cloudier (%) | 48 | 48 | 48 | 49 | 49 | 49 | 49 | 50 | 49 | 49 | 50 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 55 | 54 | 55 | 55 | 55 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 52 | 48 |
| 2 | 52 | 48 |
| 3 | 52 | 48 |
| 4 | 51 | 49 |
| 5 | 51 | 49 |
| 6 | 51 | 49 |
| 7 | 51 | 49 |
| 8 | 50 | 50 |
| 9 | 51 | 49 |
| 10 | 51 | 49 |
| 11 | 50 | 50 |
| 12 | 49 | 51 |
| 13 | 49 | 51 |
| 14 | 48 | 52 |
| 15 | 48 | 52 |
| 16 | 48 | 52 |
| 17 | 48 | 52 |
| 18 | 48 | 52 |
| 19 | 48 | 52 |
| 20 | 47 | 53 |
| 21 | 47 | 53 |
| 22 | 47 | 53 |
| 23 | 47 | 53 |
| 24 | 45 | 55 |
| 25 | 46 | 54 |
| 26 | 45 | 55 |
| 27 | 45 | 55 |
| 28 | 45 | 55 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
Chance of precipitation in April
Hamamatsu gets around 165 mm of rain over 11.1 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 37% and peaks near 38% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 37 | 37 | 37 | 36 | 36 | 36 | 35 | 35 | 35 |
| Rain chance (%) | |
|---|---|
| 1 | 37 |
| 2 | 37 |
| 3 | 37 |
| 4 | 37 |
| 5 | 37 |
| 6 | 37 |
| 7 | 37 |
| 8 | 37 |
| 9 | 37 |
| 10 | 37 |
| 11 | 38 |
| 12 | 38 |
| 13 | 38 |
| 14 | 38 |
| 15 | 38 |
| 16 | 38 |
| 17 | 38 |
| 18 | 38 |
| 19 | 38 |
| 20 | 38 |
| 21 | 38 |
| 22 | 37 |
| 23 | 37 |
| 24 | 37 |
| 25 | 36 |
| 26 | 36 |
| 27 | 36 |
| 28 | 35 |
| 29 | 35 |
| 30 | 35 |
Humidity in April
Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the dry band about 87% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 95 | 95 | 95 | 94 | 94 | 93 | 93 | 93 | 93 | 92 | 92 | 92 | 92 | 90 | 89 | 89 | 88 | 88 | 86 | 85 | 84 | 82 | 80 | 79 | 77 | 76 | 74 | 73 | 71 | 70 |
| Comfortable (%) | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 11 | 12 | 13 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| Humid (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 95 | 4 | 1 | 0 |
| 2 | 95 | 4 | 1 | 0 |
| 3 | 95 | 4 | 1 | 0 |
| 4 | 94 | 5 | 1 | 0 |
| 5 | 94 | 5 | 1 | 0 |
| 6 | 93 | 6 | 1 | 0 |
| 7 | 93 | 6 | 1 | 0 |
| 8 | 93 | 6 | 1 | 0 |
| 9 | 93 | 6 | 1 | 0 |
| 10 | 92 | 7 | 1 | 0 |
| 11 | 92 | 7 | 1 | 0 |
| 12 | 92 | 7 | 1 | 0 |
| 13 | 92 | 7 | 1 | 0 |
| 14 | 90 | 8 | 1 | 1 |
| 15 | 89 | 8 | 2 | 1 |
| 16 | 89 | 8 | 2 | 1 |
| 17 | 88 | 9 | 2 | 1 |
| 18 | 88 | 9 | 2 | 1 |
| 19 | 86 | 10 | 3 | 1 |
| 20 | 85 | 11 | 3 | 1 |
| 21 | 84 | 12 | 3 | 1 |
| 22 | 82 | 13 | 4 | 1 |
| 23 | 80 | 15 | 4 | 1 |
| 24 | 79 | 16 | 4 | 1 |
| 25 | 77 | 17 | 5 | 1 |
| 26 | 76 | 18 | 5 | 1 |
| 27 | 74 | 19 | 6 | 1 |
| 28 | 73 | 20 | 6 | 1 |
| 29 | 71 | 21 | 7 | 1 |
| 30 | 70 | 22 | 7 | 1 |
Wind in April
Winds average 13 km/h in April.
Across April, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 14 | light breeze |
| 2 | 14 | light breeze |
| 3 | 14 | light breeze |
| 4 | 14 | light breeze |
| 5 | 14 | light breeze |
| 6 | 14 | light breeze |
| 7 | 14 | light breeze |
| 8 | 14 | light breeze |
| 9 | 14 | light breeze |
| 10 | 14 | light breeze |
| 11 | 14 | light breeze |
| 12 | 14 | light breeze |
| 13 | 14 | light breeze |
| 14 | 14 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
Sunrise & sunset in April
Daylight runs from about 12 h 18 min at the start of April to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 60 minutes over April. Sunrise moves from 5:44 AM to 5:06 AM, and sunset from 6:03 PM to 6:27 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.3 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 |
| Sunrise (AM) | 5:44 | 5:43 | 5:41 | 5:40 | 5:38 | 5:37 | 5:35 | 5:34 | 5:33 | 5:31 | 5:30 | 5:29 | 5:27 | 5:26 | 5:25 | 5:23 | 5:22 | 5:21 | 5:19 | 5:18 | 5:17 | 5:16 | 5:14 | 5:13 | 5:12 | 5:11 | 5:09 | 5:08 | 5:07 | 5:06 |
| Sunset (PM) | 6:03 | 6:04 | 6:05 | 6:06 | 6:07 | 6:07 | 6:08 | 6:09 | 6:10 | 6:11 | 6:11 | 6:12 | 6:13 | 6:14 | 6:15 | 6:15 | 6:16 | 6:17 | 6:18 | 6:19 | 6:19 | 6:20 | 6:21 | 6:22 | 6:23 | 6:23 | 6:24 | 6:25 | 6:26 | 6:27 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.3 | 5:44 | 6:03 |
| 2 | 12.4 | 5:43 | 6:04 |
| 3 | 12.4 | 5:41 | 6:05 |
| 4 | 12.4 | 5:40 | 6:06 |
| 5 | 12.5 | 5:38 | 6:07 |
| 6 | 12.5 | 5:37 | 6:07 |
| 7 | 12.5 | 5:35 | 6:08 |
| 8 | 12.6 | 5:34 | 6:09 |
| 9 | 12.6 | 5:33 | 6:10 |
| 10 | 12.7 | 5:31 | 6:11 |
| 11 | 12.7 | 5:30 | 6:11 |
| 12 | 12.7 | 5:29 | 6:12 |
| 13 | 12.8 | 5:27 | 6:13 |
| 14 | 12.8 | 5:26 | 6:14 |
| 15 | 12.8 | 5:25 | 6:15 |
| 16 | 12.9 | 5:23 | 6:15 |
| 17 | 12.9 | 5:22 | 6:16 |
| 18 | 12.9 | 5:21 | 6:17 |
| 19 | 13.0 | 5:19 | 6:18 |
| 20 | 13.0 | 5:18 | 6:19 |
| 21 | 13.0 | 5:17 | 6:19 |
| 22 | 13.1 | 5:16 | 6:20 |
| 23 | 13.1 | 5:14 | 6:21 |
| 24 | 13.1 | 5:13 | 6:22 |
| 25 | 13.2 | 5:12 | 6:23 |
| 26 | 13.2 | 5:11 | 6:23 |
| 27 | 13.2 | 5:09 | 6:24 |
| 28 | 13.3 | 5:08 | 6:25 |
| 29 | 13.3 | 5:07 | 6:26 |
| 30 | 13.3 | 5:06 | 6:27 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.12 kWh/m².
For context, solar energy here swings from a low near 2.63 kWh/m² to a high of 5.38 kWh/m² in May across the year — April's 5.12 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.9 | Bright |
| 2 | 4.9 | Bright |
| 3 | 4.9 | Bright |
| 4 | 4.9 | Bright |
| 5 | 5.0 | Bright |
| 6 | 5.0 | Bright |
| 7 | 5.0 | Bright |
| 8 | 5.0 | Bright |
| 9 | 5.0 | Bright |
| 10 | 5.0 | Bright |
| 11 | 5.0 | Bright |
| 12 | 5.1 | Bright |
| 13 | 5.1 | Bright |
| 14 | 5.1 | Bright |
| 15 | 5.1 | Bright |
| 16 | 5.1 | Bright |
| 17 | 5.1 | Bright |
| 18 | 5.1 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.2 | Bright |
| 26 | 5.2 | Bright |
| 27 | 5.3 | Bright |
| 28 | 5.3 | Bright |
| 29 | 5.3 | Bright |
| 30 | 5.3 | Bright |
Hazard calendar for Hamamatsu
In April, Hamamatsu sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Hamamatsu sits in the Pacific typhoon belt; the season peaks July–October.
Is April a good time to visit Hamamatsu?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit Hamamatsu for sightseeing.
What to pack for Hamamatsu in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Hamamatsu sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear and sun protection. About 11 days see rain.
Sea temperature near Hamamatsu in April
The nearest coast averages about 17°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 13 km away) is warmest in August at about 27°C and coldest in February near 16°C.
It's comfortable for a long swim from May 25 to Nov 28 — about 6.2 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 16 | 16 | 17 | 19 | 22 | 25 | 27 | 26 | 23 | 21 | 19 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 16 | Cool |
| Mar | 16 | Cool |
| Apr | 17 | Cool |
| May | 19 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 27 | Warm |
| Sep | 26 | Warm |
| Oct | 23 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 19 | Cool |
UV index in Hamamatsu in April
Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hamamatsu peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 7 | 9 | 10 | 10 | 9 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 9 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Where is Hamamatsu?
Hamamatsu sits at 34.7°N, 137.7°E, 3 m above sea level, in Japan. The nearest listed city is Iwata, 11 km away.
Topography around Hamamatsu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hamamatsu.
Within 3 km, the terrain around Hamamatsu has only modest variations in elevation — a maximum elevation change of 41 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 274 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,569 m.
The land around Hamamatsu is covered by artificial surfaces (87%) within 3 km, water (42%) and artificial surfaces (31%) within 16 km, and trees (44%) and water (43%) 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 Hamamatsu (34.7°, 137.7333°, elevation 3 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).