Mariehamn weather in July

In July, Mariehamn sees average daytime highs of 17°C and overnight lows near 15°C, with 48 mm of rain across 7.6 wet days and about 17.7 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 18°C by the end. The sky is clear or mostly clear about 41% of the time in July, and the air most often feels comfortable.

Daylight stretches from about 18 h 24 min at the start of July to 16 h 42 min by month's end. Set against the rest of the year, July is Mariehamn's 1st-clearest and 12th-windiest month. For the whole year in context, see Mariehamn's year-round climate.

Daytime high
17°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
48 mm
7.6 wet days
Daylight
17 h 48 min
3:52 AM – 9:39 PM
Cloud cover
49%
1st clearest
Wind
20 km/h
12th windiest
Solar energy
6 kWh/m²
Travel score
5.9
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 18°C by the end.

A typical July day in Mariehamn reaches about 17°C in the afternoon and slips back to 15°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 20°C. Set against its neighbours, July runs about 4°C warmer than June and on par with August.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11514
21514
31614
41614
51614
61614
71615
81615
91615
101715
111715
121715
131715
141715
151715
161716
171716
181716
191716
201816
211816
221816
231816
241816
251816
261816
271817
281817
291817
301817
311817

How July really feels in Mariehamn

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

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mariehamn weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°4310.586.40.0
Feb / -2°297.76.58.60.0
Mar / -1°277.15.111.30.0
Apr / 296.91.714.20.0
May / 336.60.216.81.6
Jun13° / 11°497.5018.43.8
Jul17° / 15°487.6017.75.9
Aug18° / 16°5510.2015.45.8
Sep14° / 13°549.2012.64.1
Oct / 6211.80.49.81.9
Nov / 60132.97.10.4
Dec / 56136.15.60.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36238
46238
56238
66337
76337
86337
96436
106535
116535
126535
136535
146436
156436
166436
176436
186337
196337
206337
216238
226238
236238
246139
256139
266139
276139
286139
296139
306040
316040

Chance of precipitation in July

Any precipitation

Mariehamn gets around 48 mm of rain over 7.6 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
123
222
322
422
522
622
723
823
923
1024
1124
1225
1325
1425
1526
1626
1726
1826
1926
2026
2126
2226
2326
2426
2526
2626
2726
2826
2926
3027
3127

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the comfortable band about 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
17124500
26826600
36528700
46330700
56032800
65834800
75535910
852371010
950391010
1048401110
1146411210
1244421310
1342431310
1440441420
1539441520
1637451620
1735461730
1833461830
1932461930
2031461940
2129462040
2228462150
2327462250
2426462250
2525462360
2625462360
2724462361
2824452471
2923452471
3023452471
3123452471

Wind in July

Winds average 20 km/h in July, the calmest month.

Across July, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze
3120light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 18 h 24 min at the start of July to 16 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over July. Sunrise moves from 3:31 AM to 4:24 AM, and sunset from 9:56 PM to 9:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
118.43:319:56
218.43:329:56
318.43:339:55
418.33:349:54
518.33:359:53
618.33:379:52
718.23:389:52
818.23:399:50
918.13:419:49
1018.13:429:48
1118.13:449:47
1218.03:459:45
1317.93:479:44
1417.93:499:43
1517.83:519:41
1617.83:529:39
1717.73:549:38
1817.73:569:36
1917.63:589:34
2017.54:009:32
2117.54:029:30
2217.44:049:28
2317.34:069:26
2417.34:099:24
2517.24:119:22
2617.14:139:20
2717.04:159:18
2817.04:179:15
2916.94:209:13
3016.84:229:11
3116.74:249:08

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6 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 — July's 6 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.1Intense
136.1Intense
146.1Intense
156.0Intense
166.0Intense
176.0Bright
186.0Bright
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.7Bright
275.6Bright
285.6Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in July

Is July a good time to visit Mariehamn?

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

5.9
Sightseeing
1st-best month of the year
1.4
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Mariehamn for sightseeing.

What to pack for Mariehamn in July

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

In July, Mariehamn sees daytime highs around 17°C and nights near 15°C. Pack sun protection. About 8 days see rain.

sun protection

Sea temperature near Mariehamn in July

The nearest coast averages about 16°C in July — 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.

0°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May6Bracing
Jun11Bracing
Jul16Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec4Bracing

UV index in Mariehamn in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 5 — enough to warrant sun protection. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateModerateLowJun 18UV 5Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar1Low
Apr3Moderate
May4Moderate
Jun5High
Jul5Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
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
16 km
80 m
80 km
130 m
treesgrasslandcroplandartificial surfaceswaterwetland
July 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).