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Current conditions

14.6° / 13.3° Overcast
Feels like
12.9° / 11.1°
Humidity
—
Wind
17.3 km/h (gusts 29.9)
UV index
2.5
Sunrise / sunset
07:50 / 19:06
Daylight
11.3 hrs
Last updated 3 hours ago

7-day forecast

7-day forecast
Date Weather High Low Feels like Precip Rain Wind UV
Sat 3 Oct Overcast 14.6° 13.3° 12.9° / 11.1° 0.0 mm 2% 17.3 km/h 2.5
Sun 4 Oct Slight rain 13.9° 11.3° 12.0° / 9.1° 2.9 mm 53% 20.9 km/h 2.2
Mon 5 Oct Moderate drizzle 15.0° 11.8° 11.2° / 8.0° 1.3 mm 33% 30.0 km/h 2.4
Tue 6 Oct Partly cloudy 15.3° 11.7° 11.0° / 7.5° 0.0 mm 12% 29.9 km/h 2.4
Wed 7 Oct Partly cloudy 13.2° 8.4° 10.7° / 6.0° 0.0 mm 22% 15.8 km/h 2.3
Thu 8 Oct Moderate drizzle 13.6° 8.2° 11.5° / 7.1° 3.4 mm 62% 18.4 km/h 0.5
Fri 9 Oct Moderate drizzle 12.7° 5.1° 11.5° / 3.2° 3.2 mm 52% 14.1 km/h 2.0

Air quality

47
Good

US Air Quality Index

European AQI: 18

PM2.5
3.3 µg/m³
PM10
6.6 µg/m³
Ozone (O₃)
55.0 µg/m³
NOâ‚‚
2.8 µg/m³
SOâ‚‚
0.1 µg/m³
CO
173.0 µg/m³
UV index
0.1
Dust
0.0 µg/m³

Pollen

Grass
0.0
Birch
0.0
Ragweed
0.0
Measured 9 hours ago. Source: Open-Meteo.

Climate through the year

Now: October
-10° 0° 10° 20° 30° Jan: 62 mm Feb: 43 mm Mar: 30 mm Apr: 41 mm May: 35 mm Jun: 34 mm Jul: 69 mm Aug: 84 mm Sep: 61 mm Oct: 78 mm Nov: 52 mm Dec: 51 mm Jan: 1°C / -2°C Feb: 1°C / -3°C Mar: 4°C / -1°C Apr: 7°C / 1°C May: 13°C / 6°C Jun: 19°C / 12°C Jul: 21°C / 15°C Aug: 19°C / 14°C Sep: 16°C / 11°C Oct: 11°C / 7°C Nov: 5°C / 2°C Dec: 2°C / -2°C Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Average high and low, °C Rainfall, mm

Temperature by month

Precipitation and rain days

Sunshine, UV and humidity

Best months to visit

Best months to visit
Month Rating Avg high Avg low Rain days Sun (hrs) Humidity
July Good · 70 20.9°C 14.7°C 12.2 443.3 74.8%
June Good · 68 18.8°C 11.8°C 7.0 459.0 71.8%
August Good · 61 19.3°C 14.4°C 13.9 356.5 79.8%
May Fair · 50 12.7°C 5.5°C 6.4 399.9 69.9%
March Fair · 43 4.2°C -1.2°C 6.2 229.4 79.4%
September Fair · 37 15.7°C 10.9°C 10.8 279.0 81.4%
April Fair · 36 7.3°C 0.9°C 8.4 294.0 74.7%
October Poor · 23 10.5°C 6.8°C 11.8 170.5 82.5%
January Poor · 15 1.2°C -2.4°C 12.4 62.0 86.9%
February Poor · 15 0.9°C -2.9°C 8.5 98.0 85.1%
November Poor · 15 5.3°C 2.1°C 10.4 75.0 86.1%
December Poor · 15 2.0°C -1.6°C 11.2 43.4 85.8%
Ratings based on temperature comfort, rainfall, sunshine and humidity for remote workers.

Monthly climate data

Monthly climate data for Mariehamn
Month High Low Mean Feels high Feels low Precip Rain days Snow Sun Daylight UV Humidity Wind Clouds
Jan 1.2° -2.4° -0.5° -3.7° -7.6° 62.1 mm 12.4 22.8 cm 62.0 hrs 6.8 hrs — 86.9% 26.4 km/h 82.6%
Feb 0.9° -2.9° -0.8° -3.7° -7.9° 43.0 mm 8.5 17.2 cm 98.0 hrs 9.2 hrs — 85.1% 23.7 km/h 76.9%
Mar 4.2° -1.2° 1.4° -0.4° -5.9° 29.5 mm 6.2 11.5 cm 229.4 hrs 11.8 hrs — 79.4% 22.9 km/h 66.1%
Apr 7.3° 0.9° 4.0° 3.2° -3.5° 41.3 mm 8.4 9.5 cm 294.0 hrs 14.6 hrs — 74.7% 21.3 km/h 57.3%
May 12.7° 5.5° 9.2° 9.8° 2.0° 35.1 mm 6.4 0.7 cm 399.9 hrs 17.2 hrs — 69.9% 20.1 km/h 50.6%
Jun 18.8° 11.8° 15.4° 17.7° 9.8° 34.3 mm 7.0 0.0 cm 459.0 hrs 18.8 hrs — 71.8% 19.2 km/h 45.4%
Jul 20.9° 14.7° 18.1° 20.5° 13.8° 68.5 mm 12.2 0.0 cm 443.3 hrs 18.0 hrs — 74.8% 19.7 km/h 49.8%
Aug 19.3° 14.4° 16.8° 18.3° 13.1° 83.5 mm 13.9 0.0 cm 356.5 hrs 15.6 hrs — 79.8% 20.9 km/h 59.3%
Sep 15.7° 10.9° 13.3° 13.8° 8.8° 60.5 mm 10.8 0.0 cm 279.0 hrs 12.9 hrs — 81.4% 20.3 km/h 63.5%
Oct 10.5° 6.8° 8.7° 7.1° 3.1° 77.7 mm 11.8 0.2 cm 170.5 hrs 10.1 hrs — 82.5% 24.4 km/h 71.2%
Nov 5.3° 2.1° 3.8° 1.5° -2.0° 52.0 mm 10.4 9.9 cm 75.0 hrs 7.5 hrs — 86.1% 22.1 km/h 82.0%
Dec 2.0° -1.6° 0.3° -2.6° -6.3° 50.6 mm 11.2 14.8 cm 43.4 hrs 6.0 hrs — 85.8% 23.1 km/h 83.9%
Based on historical averages. Source: Open-Meteo.

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