Weather in Mariehamn in July 2025
- July is usually the hottest month of the year in Mariehamn;
Average weather
Average temperature in Mariehamn in July
Going from a maximum of +21°C during the day to a minimum of +12°C during the night, the temperature in July averages around +18°C.
The average maximum temperature goes down 33% by the end of the month, compared with the beginning of the month, from +21°C to +18°C.
Is Mariehamn warm or cold in July?
Mariehamn is typically mild in July.
Maximum temperatures go up compared to the previous month from +15°C to +19°C. The minimum temperature also goes up from +10°C to +14°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
July is the hottest month in Mariehamn, here is the comparison with other months:
Climate in Mariehamn in July
| June | July | August | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +15°C | +19°C | +18°C | ||||
| Min. temperature | ||||||
| 0°C | +6°C | +6°C | ||||
| Max. temperature | ||||||
| +27°C | +30°C | +28°C | ||||
| Rainfall | ||||||
| 45 mm | 49 mm | 63 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 5 m/s | ||||
| Humidity | ||||||
| 85% | 84% | 83% | ||||
| Air pressure | ||||||
| 1011 HPa | 1010 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 9 | 9 | 7 | ||||
| Cloudy days | ||||||
| 10 | 9 | 8 | ||||
| Rainy days | ||||||
| 11 | 12 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
July often has better weather than June. It’s getting warmer as July arrives. The average maximum temperature goes up from +15°C to +19°C during the day. Prepare for more rain. Average rainfall goes from 45 mm to 49 mm. It feels drier, as humidity decreases from 85% to 84%. The average wind speed doesn’t change much during July, staying around 4 m/s. The amount of sunny days stay about the same, averaging 9 sunny days during the month.
Next month (August) brings a further decline in the weather.
Wind
The average wind speed is 4 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 Mariehamn is gradually increasing during July, going from 3 m/s to 4 m/s over the course of the month.
Rain
How was the weather last July in Mariehamn?
Climate Change over Years
The climate in Mariehamn in July has not changed much over the last 43 years.
The average temperature was the lowest in 1987 (+5°C) and the highest in 2020 (+11°C). The driest year was 2018 with only 269 mm of rainfall, and the wettest year was 2020 with 612 mm.
FAQ
Is July a good time to visit Mariehamn?
Can you sunbathe in Mariehamn in July?
Is Mariehamn rainy in July?
Is it sunny in Mariehamn in July?
Monthly weather in Mariehamn
Source of the data
For this page, we’ve looked at the typical weather in Mariehamn, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
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.