Mariehamn weather in March

In March, Mariehamn sees average daytime highs of 1°C and overnight lows near -1°C, with 27 mm of precipitation across 7.1 wet days and about 11.3 hours of daylight. It is the 11th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 0°C in the first days to 2°C by the end. The sky is clear or mostly clear about 26% of the time in March, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of March to 12 h 42 min by month's end. Set against the rest of the year, March is Mariehamn's 7th-clearest and 6th-windiest month. For the whole year in context, see Mariehamn's year-round climate.

Daytime high: 1°; 11th warmest
Overnight low: -1°; 2nd coldest
Precipitation: 27 mm; 7.1 wet days
Daylight: 11 h 18 min; 7:10 AM – 6:30 PM
Cloud cover: 65%; 7th clearest
Wind: 25 km/h; 6th windiest
Solar energy: 2.37 kWh/m²
Travel score: 0.0; out of 10

← February Mariehamn year-round climate April →Best places to visit in March

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 0°C in the first days to 2°C by the end.

A typical March day in Mariehamn reaches about 1°C in the afternoon and slips back to -1°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between -3°C and 4°C. Set against its neighbours, March runs about 1°C warmer than February and about 3°C cooler than April.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	2	2	3
Avg low (°C)	-2	-2	-2	-2	-2	-2	-2	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	0	0	0	0	0	0	0	0	0	1

	Avg high (°C)	Avg low (°C)
1	0	-2
2	0	-2
3	0	-2
4	0	-2
5	0	-2
6	1	-2
7	1	-2
8	1	-1
9	1	-1
10	1	-1
11	1	-1
12	1	-1
13	1	-1
14	1	-1
15	1	-1
16	1	-1
17	1	-1
18	1	-1
19	2	-1
20	2	-1
21	2	-1
22	2	0
23	2	0
24	2	0
25	2	0
26	2	0
27	2	0
28	2	0
29	2	0
30	2	0
31	3	1

How March really feels in Mariehamn

Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in March is cold — wind chill drags the overnight "feels like" below the raw low.

Mariehamn weather by month

How March compares with the rest of the year at a glance. March is the 11th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	2° / -1°	43	10.5	8	6.4	0.0
Feb	0° / -2°	29	7.7	6.5	8.6	0.0
Mar	1° / -1°	27	7.1	5.1	11.3	0.0
Apr	4° / 2°	29	6.9	1.7	14.2	0.0
May	8° / 6°	33	6.6	0.2	16.8	1.6
Jun	13° / 11°	49	7.5	0	18.4	3.8
Jul	17° / 15°	48	7.6	0	17.7	5.9
Aug	18° / 16°	55	10.2	0	15.4	5.8
Sep	14° / 13°	54	9.2	0	12.6	4.1
Oct	9° / 8°	62	11.8	0.4	9.8	1.9
Nov	6° / 4°	60	13	2.9	7.1	0.4
Dec	3° / 1°	56	13	6.1	5.6	0.0

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 13% of March, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	27	28	29	30	31	32	32	34	34	35	37	37	37	39	39	40	41	42	43	43	44	44	44	44	45	45	45	45	44	44	44
Cloudier (%)	73	72	71	70	69	68	68	66	66	65	63	63	63	61	61	60	59	58	57	57	56	56	56	56	55	55	55	55	56	56	56

	Clearer (%)	Cloudier (%)
1	27	73
2	28	72
3	29	71
4	30	70
5	31	69
6	32	68
7	32	68
8	34	66
9	34	66
10	35	65
11	37	63
12	37	63
13	37	63
14	39	61
15	39	61
16	40	60
17	41	59
18	42	58
19	43	57
20	43	57
21	44	56
22	44	56
23	44	56
24	44	56
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	44	56
31	44	56

Chance of precipitation in March

Any precipitationSnow

Mariehamn gets around 27 mm of rain and snow over 7.1 wet days in March, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 23% and peaks near 29% on the wettest days, and about 5 days bring snow. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	29	28	28	28	28	27	27	27	26	26	25	25	25	24	23	23	22	21	21	20	20	19	19	19	19	19	20	20	21	21	22
Snow chance (%)	24	23	23	22	22	22	21	21	20	19	19	18	17	17	16	15	15	14	14	13	13	13	12	12	12	12	11	11	11	11	11

	Rain chance (%)	Snow chance (%)
1	29	24
2	28	23
3	28	23
4	28	22
5	28	22
6	27	22
7	27	21
8	27	21
9	26	20
10	26	19
11	25	19
12	25	18
13	25	17
14	24	17
15	23	16
16	23	15
17	22	15
18	21	14
19	21	14
20	20	13
21	20	13
22	19	13
23	19	12
24	19	12
25	19	12
26	19	12
27	20	11
28	20	11
29	21	11
30	21	11
31	22	11

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in March

Winds average 25 km/h in March.

Across March, daily wind ranges from about 23 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	26	26	26	26	26	25	25	25	25	25	25	25	25	25	25	25	24	24	24	24	24	24	24	24	24	24	24	23	23	23	23
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

	Wind speed (km/h)	Feels
1	26	breezy
2	26	breezy
3	26	breezy
4	26	breezy
5	26	breezy
6	25	breezy
7	25	breezy
8	25	breezy
9	25	breezy
10	25	breezy
11	25	breezy
12	25	breezy
13	25	breezy
14	25	breezy
15	25	breezy
16	25	breezy
17	24	breezy
18	24	breezy
19	24	breezy
20	24	breezy
21	24	breezy
22	24	breezy
23	24	breezy
24	24	breezy
25	24	breezy
26	24	breezy
27	24	breezy
28	23	breezy
29	23	breezy
30	23	breezy
31	23	breezy

Sunrise & sunset in March

DaylightNight

Daylight runs from about 9 h 54 min at the start of March to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 168 minutes over March. Sunrise moves from 7:56 AM to 6:23 AM, and sunset from 5:51 PM to 7:07 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	9.9	10.0	10.1	10.2	10.3	10.4	10.5	10.6	10.7	10.8	10.9	10.9	11.0	11.1	11.2	11.3	11.4	11.5	11.6	11.7	11.8	11.9	12.0	12.1	12.2	12.3	12.4	12.4	12.5	12.6	12.7
Sunrise (AM)	7:56	7:53	7:50	7:47	7:44	7:41	7:38	7:35	7:32	7:29	7:26	7:23	7:20	7:16	7:13	7:10	7:07	7:04	7:01	6:58	6:55	6:52	6:48	6:45	6:42	6:39	6:36	6:33	6:30	6:27	6:23
Sunset (PM)	5:51	5:54	5:56	5:59	6:02	6:04	6:07	6:09	6:12	6:14	6:17	6:19	6:22	6:25	6:27	6:30	6:32	6:35	6:37	6:40	6:42	6:45	6:47	6:50	6:52	6:55	6:57	7:00	7:02	7:04	7:07

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.9	7:56	5:51
2	10.0	7:53	5:54
3	10.1	7:50	5:56
4	10.2	7:47	5:59
5	10.3	7:44	6:02
6	10.4	7:41	6:04
7	10.5	7:38	6:07
8	10.6	7:35	6:09
9	10.7	7:32	6:12
10	10.8	7:29	6:14
11	10.9	7:26	6:17
12	10.9	7:23	6:19
13	11.0	7:20	6:22
14	11.1	7:16	6:25
15	11.2	7:13	6:27
16	11.3	7:10	6:30
17	11.4	7:07	6:32
18	11.5	7:04	6:35
19	11.6	7:01	6:37
20	11.7	6:58	6:40
21	11.8	6:55	6:42
22	11.9	6:52	6:45
23	12.0	6:48	6:47
24	12.1	6:45	6:50
25	12.2	6:42	6:52
26	12.3	6:39	6:55
27	12.4	6:36	6:57
28	12.4	6:33	7:00
29	12.5	6:30	7:02
30	12.6	6:27	7:04
31	12.7	6:23	7:07

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 2.37 kWh/m².

For context, solar energy here swings from a low near 0.18 kWh/m² to a high of 6.29 kWh/m² in June across the year — March's 2.37 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	1.5	1.6	1.6	1.7	1.7	1.8	1.8	1.9	1.9	2.0	2.0	2.1	2.2	2.2	2.3	2.4	2.4	2.5	2.5	2.6	2.7	2.8	2.8	2.9	2.9	3.0	3.1	3.1	3.2	3.2	3.3
Level	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	1.5	Dim
2	1.6	Dim
3	1.6	Dim
4	1.7	Dim
5	1.7	Dim
6	1.8	Dim
7	1.8	Dim
8	1.9	Dim
9	1.9	Dim
10	2.0	Dim
11	2.0	Moderate
12	2.1	Moderate
13	2.2	Moderate
14	2.2	Moderate
15	2.3	Moderate
16	2.4	Moderate
17	2.4	Moderate
18	2.5	Moderate
19	2.5	Moderate
20	2.6	Moderate
21	2.7	Moderate
22	2.8	Moderate
23	2.8	Moderate
24	2.9	Moderate
25	2.9	Moderate
26	3.0	Moderate
27	3.1	Moderate
28	3.1	Moderate
29	3.2	Moderate
30	3.2	Moderate
31	3.3	Moderate

Planning a trip in March

Is March a good time to visit Mariehamn?

Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0

Sightseeing

8th-best month of the year

0.0

Beach & pool

5th-best month of the year

March is a weaker month for outdoor sightseeing in Mariehamn.

What to pack for Mariehamn in March

From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In March, Mariehamn sees daytime highs around 1°C and nights near -1°C. Pack a warm layer and a heavy coat. Worth having: a windbreaker. About 7 days see rain.

a warm layera heavy coata windbreaker

Sea temperature near Mariehamn in March

The nearest coast averages about 1°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 17°C and coldest in February near 1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	2	1	1	3	6	11	16	17	14	10	7	4
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	2	Bracing
Feb	1	Bracing
Mar	1	Bracing
Apr	3	Bracing
May	6	Bracing
Jun	11	Bracing
Jul	16	Cool
Aug	17	Cool
Sep	14	Bracing
Oct	10	Bracing
Nov	7	Bracing
Dec	4	Bracing

UV index in Mariehamn in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mariehamn peaks around June 18 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	1	3	4	5	5	4	3	1	0	0
Level	Low	Low	Low	Moderate	Moderate	High	Moderate	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	1	Low
Apr	3	Moderate
May	4	Moderate
Jun	5	High
Jul	5	Moderate
Aug	4	Moderate
Sep	3	Moderate
Oct	1	Low
Nov	0	Low
Dec	0	Low

Location & terrain

Where is Mariehamn?

Mariehamn sits at 60.1°N, 19.9°E, 11 m above sea level, in Aland Islands. The nearest listed city is Norrtälje, 78 km away.

Topography around Mariehamn

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mariehamn.

Within 3 km, the terrain around Mariehamn has only modest variations in elevation — a maximum elevation change of 55 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, only modest variations in elevation — a maximum elevation change of 130 m.

The land around Mariehamn is covered by water (44%) and trees (32%) within 3 km, water (55%) and trees (31%) within 16 km, and water (86%) within 80 km.

3 km

55 m

water 44%

16 km

80 m

water 55%

80 km

130 m

water 86%

treesgrasslandcroplandartificial surfaceswaterwetland

← February Mariehamn year-round climate April →Best places to visit in March

March weather nearby: Norrtälje 78 km · Åkersberga 114 km · Vallentuna 121 km · Gustavsberg 122 km · Naantali 122 km · Boo 126 km · Täby 127 km · Märsta 128 km

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mariehamn (60.0973°, 19.9348°, elevation 11 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	0	-2
2	0	-2
3	0	-2
4	0	-2
5	0	-2
6	1	-2
7	1	-2
8	1	-1
9	1	-1
10	1	-1
11	1	-1
12	1	-1
13	1	-1
14	1	-1
15	1	-1
16	1	-1
17	1	-1
18	1	-1
19	2	-1
20	2	-1
21	2	-1
22	2	0
23	2	0
24	2	0
25	2	0
26	2	0
27	2	0
28	2	0
29	2	0
30	2	0
31	3	1

	Clearer (%)	Cloudier (%)
1	27	73
2	28	72
3	29	71
4	30	70
5	31	69
6	32	68
7	32	68
8	34	66
9	34	66
10	35	65
11	37	63
12	37	63
13	37	63
14	39	61
15	39	61
16	40	60
17	41	59
18	42	58
19	43	57
20	43	57
21	44	56
22	44	56
23	44	56
24	44	56
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	44	56
31	44	56

	Rain chance (%)	Snow chance (%)
1	29	24
2	28	23
3	28	23
4	28	22
5	28	22
6	27	22
7	27	21
8	27	21
9	26	20
10	26	19
11	25	19
12	25	18
13	25	17
14	24	17
15	23	16
16	23	15
17	22	15
18	21	14
19	21	14
20	20	13
21	20	13
22	19	13
23	19	12
24	19	12
25	19	12
26	19	12
27	20	11
28	20	11
29	21	11
30	21	11
31	22	11

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	0	-2
2	0	-2
3	0	-2
4	0	-2
5	0	-2
6	1	-2
7	1	-2
8	1	-1
9	1	-1
10	1	-1
11	1	-1
12	1	-1
13	1	-1
14	1	-1
15	1	-1
16	1	-1
17	1	-1
18	1	-1
19	2	-1
20	2	-1
21	2	-1
22	2	0
23	2	0
24	2	0
25	2	0
26	2	0
27	2	0
28	2	0
29	2	0
30	2	0
31	3	1

	Clearer (%)	Cloudier (%)
1	27	73
2	28	72
3	29	71
4	30	70
5	31	69
6	32	68
7	32	68
8	34	66
9	34	66
10	35	65
11	37	63
12	37	63
13	37	63
14	39	61
15	39	61
16	40	60
17	41	59
18	42	58
19	43	57
20	43	57
21	44	56
22	44	56
23	44	56
24	44	56
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	44	56
31	44	56

	Rain chance (%)	Snow chance (%)
1	29	24
2	28	23
3	28	23
4	28	22
5	28	22
6	27	22
7	27	21
8	27	21
9	26	20
10	26	19
11	25	19
12	25	18
13	25	17
14	24	17
15	23	16
16	23	15
17	22	15
18	21	14
19	21	14
20	20	13
21	20	13
22	19	13
23	19	12
24	19	12
25	19	12
26	19	12
27	20	11
28	20	11
29	21	11
30	21	11
31	22	11

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	0	-2
2	0	-2
3	0	-2
4	0	-2
5	0	-2
6	1	-2
7	1	-2
8	1	-1
9	1	-1
10	1	-1
11	1	-1
12	1	-1
13	1	-1
14	1	-1
15	1	-1
16	1	-1
17	1	-1
18	1	-1
19	2	-1
20	2	-1
21	2	-1
22	2	0
23	2	0
24	2	0
25	2	0
26	2	0
27	2	0
28	2	0
29	2	0
30	2	0
31	3	1

	Clearer (%)	Cloudier (%)
1	27	73
2	28	72
3	29	71
4	30	70
5	31	69
6	32	68
7	32	68
8	34	66
9	34	66
10	35	65
11	37	63
12	37	63
13	37	63
14	39	61
15	39	61
16	40	60
17	41	59
18	42	58
19	43	57
20	43	57
21	44	56
22	44	56
23	44	56
24	44	56
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	44	56
31	44	56

	Rain chance (%)	Snow chance (%)
1	29	24
2	28	23
3	28	23
4	28	22
5	28	22
6	27	22
7	27	21
8	27	21
9	26	20
10	26	19
11	25	19
12	25	18
13	25	17
14	24	17
15	23	16
16	23	15
17	22	15
18	21	14
19	21	14
20	20	13
21	20	13
22	19	13
23	19	12
24	19	12
25	19	12
26	19	12
27	20	11
28	20	11
29	21	11
30	21	11
31	22	11

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100