Weather in Gunma for August 2026
Expect cooler weather in first days of August 2026 in Gunma with the forecast suggesting a temperature of 30.4 °C, lower than the historical average.
In general, the average temperature in Gunma at the beginning of August is 29.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.7 °C by the end of August.
Gunma experiences heavy rainfall in August, with over 20 rainy days and an average total precipitation 218.9 mm.
Is August a good time to visit Gunma? check out the best time to travel to Gunma page.
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Gunma Weather August
What’s the Weather Like in Gunma This August?
Temperatures trend during August in Gunma
August weather in Gunma day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Sunny | 31° /18° | 0 mm | 8 | |
| 2 Aug. | Sunny | 33° /19° | 0 mm | 8 | |
| 3 Aug. | Sunny | 33° /20° | 0.1 mm | 8 | |
| 4 Aug. |  Patchy rain possible | 31° /19° | 3.3 mm | 7 | |
| 5 Aug. | Light rain shower | 30° /19° | 4.9 mm | 7 | |
| 6 Aug. | Light rain shower | 27° /19° | 8.1 mm | 6 | |
| 7 Aug. |  Patchy light rain with thunder | 23° /17° | 17.1 mm | 5 | |
| 8 Aug. | Light rain shower | 26° /16° | 4.6 mm | 6 | |
| 9 Aug. | Light rain shower | 27° /16° | 5.6 mm | 6 | |
| 10 Aug. | Patchy rain possible | 24° /17° | 7.8 mm | 5 | |
| 11 Aug. |  Thundery outbreaks possible | 27° /17° | 3.9 mm | 6 | |
| 12 Aug. | Light rain shower | 26° /18° | 5.6 mm | 6 | |
| 13 Aug. | Light rain shower | 27° /19° | 11.9 mm | 6 | |
| 14 Aug. | Light rain shower | 26° /19° | 12.6 mm | 6 | |
| 15 Aug. | Light rain shower | 26° /18° | 9 mm | 6 | |
| 16 Aug. | Light rain shower | 25° /18° | 8.3 mm | 6 | |
| 17 Aug. | Patchy rain possible | 30° /18° | 1.7 mm | 7 | |
| 18 Aug. | Light rain shower | 29° /18° | 5.9 mm | 6 | |
| 19 Aug. | Patchy light rain with thunder | 29° /18° | 11.4 mm | 6 | |
| 20 Aug. | Patchy rain possible | 28° /18° | 5.2 mm | 6 | |
| 21 Aug. | Patchy rain possible | 28° /18° | 4 mm | 6 | |
| 22 Aug. | Light rain shower | 25° /18° | 4.7 mm | 6 | |
| 23 Aug. | Patchy light rain with thunder | 29° /19° | 4.1 mm | 6 | |
| 24 Aug. | Patchy light rain with thunder | 28° /20° | 15 mm | 6 | |
| 25 Aug. |  Moderate or heavy rain shower | 24° /19° | 18.6 mm | 5 | |
| 26 Aug. | Light rain shower | 26° /19° | 9 mm | 6 | |
| 27 Aug. | Light rain shower | 26° /18° | 5.2 mm | 6 | |
| 28 Aug. | Light rain shower | 25° /17° | 8.6 mm | 6 | |
| 29 Aug. | Light rain shower | 26° /16° | 6.9 mm | 6 | |
| 30 Aug. | Light rain shower | 26° /19° | 10.6 mm | 6 | |
| 31 Aug. | Light rain shower | 27° /19° | 3.9 mm | 6 | |
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Gunma weather in August vs July vs September
| July | August | September | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 27°/18° | 27°/18° | 23°/16° |
| Rainfall | 202 mm | 219 mm | 149 mm |
| Wind | 8.8 km/h | 7.7 km/h | 8.3 km/h |
| Humidity | 81% | 83% | 85% |
| Rainy days | 27 days | 28 days | 27 days |
| Dry days | 4 days | 3 days | 3 days |
Planning a trip to Gunma? Discover the best time to visit
Gunma in August - FAQ
What are the expected maximum and minimum temperatures in Gunma during August?
How much rainfall should be expected in Gunma during August?
What are the typical wind conditions in Gunma during August?
August rainfall patterns in Gunma
UV exposure in Gunma during August
What to pack to Gunma in August?
Warm & sunny · highs around 27 °C, frequent showers
As you prepare for your trip to Gunma in August, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Gunma, during August, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
🧴 Personal Items
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Where is Gunma?Get accurate weather forecasts for Gunma, located at latitude 36.617 and longitude 138.6. Stay updated with localized weather information tailored for Gunma.