If you plan to visit Mariehamn in August, the weather is typically alright, with an average high temperature of +18°C during the day and approximately 7 sunny days. Expect some rainy, though, as there are typically 16 rainy days in the month and around 63 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+18°C
Avg. max. temperature
+6°C
Min.
+28°C
Max.
63 mm
Total precipitation
83%
Avg. humidity
5 m/s
Avg. wind
7 ☀️
Sunny Days
8 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: Mariehamn has OK weather in August.
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Average temperature in Mariehamn in August
Here are the expected maximum, average and minimum temperatures in Mariehamn for August based on the historical data.
Last Year
Historical Data
Going from a maximum of +22°C during the day to a minimum of +13°C during the night, the temperature in August averages around +18°C.
The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +18°C to +17°C.
Is Mariehamn warm or cold in August?
Mariehamn is typically mild in August.
Maximum temperatures go down compared to the previous month from +19°C to +18°C. The minimum temperature also goes up from +14°C to +14°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 Mariehamn, here is the comparison with other months:
Climate in Mariehamn in August
Mariehamn weather looks like this, on average, in August and the surrounding months.
July
August
September
Avg. temperature
+19°C
+18°C
+14°C
Min. temperature
+6°C
+6°C
+1°C
Max. temperature
+30°C
+28°C
+24°C
Rainfall
49 mm
63 mm
55 mm
Wind
4 m/s
5 m/s
6 m/s
Humidity
84%
83%
81%
Air pressure
1010 HPa
1011 HPa
1012 HPa
Sunny days
9
7
4
Cloudy days
9
8
10
Rainy days
12
16
15
Snowy days
0
0
0
August typically has worse weather conditions compared to July.It’s getting colder in August. From +19°C in the day, the average maximum temperature lowers to +18°C.Prepare for more rain. Average rainfall goes from 49 mm to 63 mm.It feels drier, as humidity decreases from 84% to 83%.Winds are stronger in comparison to July, going up from 4 m/s to 5 m/s on average.The days becoming less sunny, going from 9 sunny days in July to 7 in August.
September brings much the same weather, it remains ok.
Wind speed in Mariehamn in August based on historical data.
Last Year
Historical Data
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 decreasing during August, going from 4 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during August in Mariehamn based on historical data.
Last Year
Historical Data
Typically, there is a 65% chance of rain on an average day in August, with total rainfall of approximately 110 mm. The maximum amount of rainfall per day is around 16 mm, which is considered light rain.August is a pretty wet month with over 20 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
August is one of the rainiest months in Mariehamn, here is a comparison with other months, total mm:
Mariehamn wettest month is October, where a typical day has a 55% chance of precipitation and 64 mm of rainfall per day. February, on the other hand, is the driest month with a mere 7% chance of precipitation and 7 mm of rainfall per day.
How was the weather last August in Mariehamn?
This is the weather in Mariehamn in August 2023:
1 August
☀️
+18°C
2 August
☁️
+19°C
3 August
🌧️
+18°C
4 August
☁️
+19°C
5 August
☀️
+18°C
6 August
☀️
+19°C
7 August
☁️
+22°C
8 August
🌧️
+19°C
9 August
☀️
+16°C
10 August
🌧️
+15°C
11 August
🌧️
+15°C
12 August
☀️
+16°C
13 August
☀️
+17°C
14 August
☀️
+18°C
15 August
☀️
+19°C
16 August
☁️
+17°C
17 August
☀️
+18°C
18 August
☀️
+18°C
19 August
☀️
+18°C
20 August
☀️
+17°C
21 August
☁️
+18°C
22 August
☁️
+18°C
23 August
☀️
+19°C
24 August
☁️
+18°C
25 August
☁️
+18°C
26 August
🌧️
+19°C
27 August
☀️
+18°C
28 August
☁️
+16°C
29 August
☀️
+17°C
30 August
🌧️
+16°C
31 August
☁️
+17°C
In August 2023 Mariehamn had 15 sunny days, 10 cloudy days, and 6 rainy days. The average maximum temperature was +18°C, with an absolute maximum of +22°C and a minimum of +15°C. The average humidity was 88%, with a maximum of 99% and a minimum of 76%. The average wind speed was 4 m/s, with a maximum of 11 m/s and a minimum of 0 m/s.
Are you planning a trip in August?
Climate Change over Years
This is how Mariehamn climate have been changing during last 43 years period.
The climate in Mariehamn in August 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
Frequently asked questions about the weather in Mariehamn in August:
Is August a good time to visit Mariehamn?
It’s always a good time to visit Mariehamn, but the weather is changeable in August, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Mariehamn in August?
August has mild temperatures in Mariehamn. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Mariehamn rainy in August?
Mariehamn is often rainy in August. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Mariehamn in August?
Usually, it’s not very sunny in Mariehamn in August, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
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, 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.
