Weather in Harstad in August 2025
Average weather
Average temperature in Harstad in August
The temperature in August is +16°C on average, with a range between a maximum of +23°C during the day and a minimum of +10°C at night.
The average maximum temperature goes down 31% by the end of the month, compared with the beginning of the month, from +19°C to +15°C.
Is Harstad warm or cold in August?
Harstad is typically mild in August.
Maximum temperatures go down compared to the previous month from +15°C to +14°C. The minimum temperature also goes up from +11°C to +11°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the warmest months in Harstad, here is the comparison with other months:
Climate in Harstad in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +15°C | +14°C | +11°C | ||||
| Min. temperature | ||||||
| +5°C | +3°C | -3°C | ||||
| Max. temperature | ||||||
| +30°C | +28°C | +20°C | ||||
| Rainfall | ||||||
| 104 mm | 103 mm | 118 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 79% | 81% | 82% | ||||
| Air pressure | ||||||
| 1010 HPa | 1010 HPa | 1008 HPa | ||||
| Sunny days | ||||||
| 1 | 1 | 2 | ||||
| Cloudy days | ||||||
| 9 | 8 | 7 | ||||
| Rainy days | ||||||
| 21 | 21 | 21 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting colder in August. From +15°C in the day, the average maximum temperature lowers to +14°C. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 104 mm to 103 mm. Humidity rises from 79% to 81%. The average wind speed doesn’t change much during August, staying around 2 m/s. The amount of sunny days stay about the same, averaging 1 sunny days during the month.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Harstad is gradually decreasing during August, going from 4 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Harstad?
Climate Change over Years
The climate in Harstad in August has not changed much over the last 43 years.
The average temperature was the lowest in 1981 (+4°C) and the highest in 2011 (+7°C). The driest year was 1980 with only 570 mm of rainfall, and the wettest year was 2005 with 1322 mm.
FAQ
Is August a good time to visit Harstad?
Can you sunbathe in Harstad in August?
Is Harstad rainy in August?
Is it sunny in Harstad in August?
Other cities in Norway
Monthly weather in Harstad
Source of the data
For this page, we’ve looked at the typical weather in Harstad, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.