April weather forecast
Hamamatsu, Japan

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Weather in April

As the mild temperature of April greets Hamamatsu, it resembles the welcoming arms of spring. This month, compared to March, experiences a noticeable leap in temperature, reaching up to 16.5°C (61.7°F), indicative of the warmth creeping in. Despite a rise in relative humidity and rainfall, sunshine duration experiences a substantial expansion. A vibrant city life thrives under increased daylight hours, strenuous activities become more welcome with decreased wind speeds. The nearly constant visibility enhances outdoor sightseeing opportunities.

Temperature

As April sets, the average high-temperature shows a slight increase, moving up from a fresh 12.6°C (54.7°F) in March to an enjoyable 16.5°C (61.7°F). In Hamamatsu, in April, the average low-temperature is a cool 10.5°C (50.9°F).

Humidity

The average relative humidity in April is 71%.

Rainfall

In Hamamatsu, during April, the rain falls for 13.8 days and regularly aggregates up to 114mm (4.49") of precipitation. In Hamamatsu, during the entire year, the rain falls for 160.9 days and collects up to 1265mm (49.8") of precipitation.

Snowfall

In Hamamatsu, snow does not fall in January, March through December.

Sea temperature

In Hamamatsu, in April, the average water temperature is 16.8°C (62.2°F).
Note: The majority find it unenjoyable to swim in 16.8°C (62.2°F). Breathing becomes tougher as the water temperature descends under 21°C (69.8°F).

Daylight

The average length of the day in April in Hamamatsu, Japan, is 13h and 4min.
On the first day of the month, sunrise is at 05:35 and sunset at 18:10. On the last day of April, in Hamamatsu, sunrise is at 04:59 and sunset at 18:33 JST.

Sunshine

In April, the average sunshine in Hamamatsu is 9h.

UV index

In Hamamatsu, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: A maximum UV index of 4 in April translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
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Frequently asked questions

What are the temperatures in Hamamatsu in April?

In April, in Hamamatsu, the average high-temperature is 16.5°C (61.7°F), and the average low-temperature is 10.5°C (50.9°F).

What is the average humidity in April in Hamamatsu?

In April, the average relative humidity in Hamamatsu, Japan, is 71%.

How many days does it rain in April in Hamamatsu?

In April, the rain falls for 13.8 days. Throughout April, 114mm (4.49") of precipitation is accumulated.

When it does not snow in Hamamatsu?

January, March through December are months without snowfall in Hamamatsu, Japan.

How cold is the water in April in Hamamatsu?

In Hamamatsu, the average seawater temperature in April is 16.8°C (62.2°F). For most, swimming in 16.8°C (62.2°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

How many hours of daylight does Hamamatsu have in April?

The average day length in April in Hamamatsu, Japan, is 13h and 4min.

When are sunrise and sunset in April in Hamamatsu?

In April, on the first day of the month, sunrise is at 05:35 and sunset at 18:10. On the last day of the month, in Hamamatsu, Japan, sunrise is at 04:59 and sunset at 18:33 JST.

How many hours of sunshine does Hamamatsu have in April?

In Hamamatsu, the average sunshine duration in April is 9h.

What is the UV index reading in April in Hamamatsu?

In Hamamatsu, Japan, the average daily maximum UV index in April is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAprilMJJASOND
Mar
April
May
Average high temperature
12.6°C 54.7°F
16.5°C 61.7°F
21°C 69.8°F
Average low temperature
6.3°C 43.3°F
10.5°C 50.9°F
15.3°C 59.5°F
Average pressure
1016.3mbar 30.01inHg
1014.6mbar 29.96inHg
1012.1mbar 29.89inHg
Average wind speed
19.2km/h 11.9mph
17.4km/h 10.8mph
14.4km/h 8.9mph
Average max. wind speed
20.5km/h 12.7mph
18.8km/h 11.7mph
15.5km/h 9.6mph
Average wind speed gusts
28.2km/h 17.5mph
26.2km/h 16.3mph
22.1km/h 13.7mph
Average humidity
68%
71%
73%
Average rainfall
88mm 3.46"
114mm 4.49"
115mm 4.53"
Average rainfall days
12.8
13.8
12.2
Average snowfall
0mm 0"
0mm 0"
0mm 0"
Average snowfall days
0
0
0
Average sea temperature
15.1°C 59.2°F
16.8°C 62.2°F
19°C 66.2°F
Average daylight
12h 0min
13h 1min
14h 0min
Average sunshine
7h 2min
9h 0min
9h 4min
Average sunshine days
17.1
13.8
16.7
Average UV index
3
4
5
Average cloud cover
34%
37%
33%
Average visibility
10km 6.2mi
10km 6.2mi
10km 6.2mi

Average temperature in April
Hamamatsu, Japan

Average temperature in April - Hamamatsu, Japan
  • Average high temperature in April: 16.5°C

The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (8.5°C).

  • Average low temperature in April: 10.5°C

The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (3.2°C).

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Average pressure in April
Hamamatsu, Japan

Average pressure in April - Hamamatsu, Japan
  • Average pressure in April: 1014.6mbar

The month with the highest atmospheric pressure is November (1018.6mbar).
The month with the lowest atmospheric pressure is June (1009mbar).

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Average wind speed in April
Hamamatsu, Japan

Average wind speed in April - Hamamatsu, Japan
  • Average wind speed in April: 17.4km/h

The windiest month (with the highest average wind speed) is January (22.9km/h).
The calmest months (with the lowest average wind speed) are July and August (12.2km/h).

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Average humidity in April
Hamamatsu, Japan

Average humidity in April - Hamamatsu, Japan
  • Average humidity in April: 71%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is January (65%).

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Average rainfall in April
Hamamatsu, Japan

Average rainfall in April - Hamamatsu, Japan
  • Average rainfall in April: 114mm

The wettest month (with the highest rainfall) is July (205mm).
The driest month (with the least rainfall) is January (37mm).

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Average rainfall days in April
Hamamatsu, Japan

Average rainfall days in April - Hamamatsu, Japan
  • Average rainfall days in April: 13.8 days

The month with the highest number of rainy days is July (20.4 days).
The month with the least rainy days is January (5.9 days).

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Average snowfall in April
Hamamatsu, Japan

Average snowfall in April - Hamamatsu, Japan
  • Average snowfall in April: 0mm

The month with the highest snowfall is February (1mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in April
Hamamatsu, Japan

Average snowfall days in April - Hamamatsu, Japan
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average sea temperature in April
Hamamatsu, Japan

Average sea temperature in April - Hamamatsu, Japan
  • Average sea temperature in April: 16.8°C

The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).

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Average daylight in April /
Average sunshine in April
Hamamatsu, Japan

Average daylight in April / Average sunshine in April - Hamamatsu, Japan
  • Average daylight in April: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in April: 9h

The month with the most sunshine is August (Average sunshine: 11h).
The month with the least sunshine is February (Average sunshine: 6h).

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Average sunshine days in April
Hamamatsu, Japan

Average sunshine days in April - Hamamatsu, Japan
  • Average sunshine days in April: 13.8 days

The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is July (9.4 days).

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Average UV index in April
Hamamatsu, Japan

Average UV index in April - Hamamatsu, Japan
  • Average UV index in April: 4

The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).

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Average cloud cover in April
Hamamatsu, Japan

Average cloud cover in April - Hamamatsu, Japan
  • Average cloud cover in April: 37

The month with the most cloud cover is June (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 25).

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Average visibility in April
Hamamatsu, Japan

Average visibility in April - Hamamatsu, Japan
  • Average visibility in April: 10km

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).

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Hamamatsu, Japan

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