Climate Insights for Heda

Numazu-shi, Shizuoka, Japan

Hottest
August
28°C peak
Coldest
January
6°C low
Wettest
July
349mm rain
Best to Visit
Varies throughout year

Climate Overview

The climate in Heda is temperate. The average annual temperature is 17°C and approximately 2519mm of precipitation falls per year. Heda receives a notable amount of rainfall throughout the year, including during its driest month. Heda is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 6°C.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 10° Average: 8° Min: 6° Feb Max: 10° Average: 8° Min: 6° Mar Max: 13° Average: 11° Min: 9° Apr Max: 16° Average: 14° Min: 12° May Max: 20° Average: 18° Min: 16° Jun Max: 23° Average: 21° Min: 20° Jul Max: 26° Average: 25° Min: 23° Aug Max: 28° Average: 26° Min: 25° Sep Max: 26° Average: 24° Min: 22° Oct Max: 21° Average: 19° Min: 18° Nov Max: 17° Average: 15° Min: 13° Dec Max: 12° Average: 10° Min: 8°
Max
Average
Min

Temperatures in Heda vary considerably across the year, with a 22°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 28°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 6°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 85mm Snow: 1mm Feb Precipitation: 128mm Snow: 1mm Mar Precipitation: 204mm Snow: 0mm Apr Precipitation: 243mm Snow: 0mm May Precipitation: 251mm Snow: 0mm Jun Precipitation: 342mm Snow: 0mm Jul Precipitation: 349mm Snow: 0mm Aug Precipitation: 210mm Snow: 0mm Sep Precipitation: 261mm Snow: 0mm Oct Precipitation: 219mm Snow: 0mm Nov Precipitation: 152mm Snow: 0mm Dec Precipitation: 78mm Snow: 0mm
Precipitation
Snow

Heda is a very wet location, receiving approximately 2519mm of precipitation annually, which averages out to around 210mm per month. The wettest month is July, averaging 349mm of rainfall. June and September also tend to see above-average precipitation. The driest month is December, with just 78mm. That's 271mm less than July, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 21km/h Feb Wind Speed: 21km/h Mar Wind Speed: 21km/h Apr Wind Speed: 20km/h May Wind Speed: 17km/h Jun Wind Speed: 17km/h Jul Wind Speed: 16km/h Aug Wind Speed: 16km/h Sep Wind Speed: 17km/h Oct Wind Speed: 17km/h Nov Wind Speed: 17km/h Dec Wind Speed: 20km/h
Wind Speed

Heda is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 20km/h in winter, 19km/h in spring, 16km/h in summer, 17km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

89 days until Summer

It is currently spring in Heda, which began on March 20, 2026. Heda is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 28°C, while the coldest stretch bottoms out in January near 6°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 9 to 20°C. Rainfall is heavy, totalling around 698mm across the season with a monthly average of 233mm. Winds are moderate at around 19km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 20 to 28°C. Rainfall is heavy, totalling around 900mm across the season with a monthly average of 300mm. Winds are moderate at around 16km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 13 to 26°C. Rainfall is heavy, totalling around 632mm across the season with a monthly average of 211mm. Winds are moderate at around 17km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 6 to 12°C. Precipitation is moderate at around 290mm for the season, averaging 97mm per month. Winds are moderate at around 20km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Monthly Climate Data

The table below shows monthly climate averages for Heda based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
6 °C
10 °C
21 km/h
85 mm
1 cm
Feb
6 °C
10 °C
21 km/h
128 mm
1 cm
Mar Current
9 °C
13 °C
21 km/h
204 mm
0 cm
Apr
12 °C
16 °C
20 km/h
243 mm
0 cm
May
16 °C
20 °C
17 km/h
251 mm
0 cm
Jun
20 °C
23 °C
17 km/h
342 mm
0 cm
Jul
23 °C
26 °C
16 km/h
349 mm
0 cm
Aug
25 °C
28 °C
16 km/h
210 mm
0 cm
Sep
22 °C
26 °C
17 km/h
261 mm
0 cm
Oct
18 °C
21 °C
17 km/h
219 mm
0 cm
Nov
13 °C
17 °C
17 km/h
152 mm
0 cm
Dec
8 °C
12 °C
20 km/h
78 mm
0 cm
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Metric (°C, km/h)