Härnösand weather in September

In September, Härnösand sees average daytime highs of 14°C and overnight lows near 7°C, with 57 mm of rain across 9.6 wet days and about 12.6 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 12°C by the end. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of September to 11 h 06 min by month's end. Set against the rest of the year, September is Härnösand's 7th-clearest and 7th-windiest month. For the whole year in context, see Härnösand's year-round climate.

Daytime high
14°
4th warmest
Overnight low
9th coldest
Rainfall
57 mm
9.6 wet days
Daylight
12 h 36 min
5:25 AM – 6:00 PM
Cloud cover
66%
7th clearest
Wind
14 km/h
7th windiest
Solar energy
2.43 kWh/m²
Travel score
3.9
out of 10

Härnösand is urban area in Härnösand Municipality, Sweden.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 16°C in the first days to 12°C by the end.

A typical September day in Härnösand reaches about 14°C in the afternoon and slips back to 7°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 17°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
1169
2169
3169
4169
5169
6169
7159
8159
9158
10158
11158
12158
13148
14148
15148
16147
17147
18147
19137
20137
21137
22136
23136
24126
25126
26126
27126
28126
29115
30115

How September really feels in Härnösand

Once humidity and wind are folded in, September 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

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

Härnösand weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -7°5310.510.65.60.0
Feb-2° / -7°378.78.58.20.0
Mar / -5°367.57.111.20.0
Apr / -1°3883.814.40.8
May12° / 418.90.417.43.0
Jun16° / 499.3019.45.1
Jul20° / 12°6510.9018.56.0
Aug19° / 11°7111.4015.85.7
Sep14° / 579.6012.63.9
Oct / 6710.61.29.51.1
Nov / -1°5810.95.56.50.0
Dec-0° / -5°5611.48.64.60.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23961
34060
44060
54060
64060
74060
84159
94159
104060
113961
123961
133961
143961
153862
163862
173763
183763
193763
203763
213664
223763
233763
243763
253763
263763
273664
283664
293664
303664

Chance of precipitation in September

Any precipitation

Härnösand gets around 57 mm of rain over 9.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
235
335
434
534
633
733
833
933
1033
1133
1233
1334
1434
1534
1633
1733
1833
1933
2033
2133
2233
2333
2433
2533
2633
2733
2834
2934
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
185141
286131
387121
488111
589101
69190
79280
89370
99370
109460
119550
129550
139640
149640
159730
169730
179730
189820
199820
209910
219910
229910
239910
249910
2510000
2610000
2710000
2810000
2910000
3010000

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 14 h 12 min at the start of September to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 186 minutes over September. Sunrise moves from 4:43 AM to 6:03 AM, and sunset from 6:53 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:436:53
214.14:466:49
313.94:496:46
413.84:526:42
513.74:546:39
613.64:576:35
713.55:006:32
813.45:036:28
913.35:056:25
1013.25:086:21
1113.15:116:18
1213.05:146:14
1312.95:166:11
1412.85:196:07
1512.75:226:04
1612.65:256:00
1712.55:275:57
1812.45:305:54
1912.35:335:50
2012.25:365:47
2112.15:385:43
2212.05:415:40
2311.95:445:36
2411.85:475:33
2511.75:495:29
2611.65:525:26
2711.55:555:22
2811.45:585:19
2911.26:005:15
3011.16:035:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.43 kWh/m².

For context, solar energy here swings from a low near 0.09 kWh/m² to a high of 5.83 kWh/m² in June across the year — September's 2.43 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.2Moderate
23.1Moderate
33.1Moderate
43.0Moderate
53.0Moderate
62.9Moderate
72.9Moderate
82.8Moderate
92.8Moderate
102.7Moderate
112.6Moderate
122.6Moderate
132.5Moderate
142.5Moderate
152.4Moderate
162.4Moderate
172.3Moderate
182.3Moderate
192.2Moderate
202.2Moderate
212.1Moderate
222.1Moderate
232.0Moderate
242.0Dim
251.9Dim
261.9Dim
271.8Dim
281.8Dim
291.7Dim
301.7Dim
Planning a trip in September

Is September a good time to visit Härnösand?

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

3.9
Sightseeing
4th-best month of the year
0.2
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Härnösand.

What to pack for Härnösand in September

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

In September, Härnösand sees daytime highs around 14°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Härnösand in September

The nearest coast averages about 13°C in September — 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 16°C and coldest in March near 1°C.

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

0°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr2Bracing
May5Bracing
Jun10Bracing
Jul15Bracing
Aug16Cool
Sep13Bracing
Oct9Bracing
Nov6Bracing
Dec3Bracing

UV index in Härnösand in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Härnösand peaks around June 17 at about 4 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 17UV 4Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar1Low
Apr2Moderate
May4Moderate
Jun4Moderate
Jul4Moderate
Aug4Moderate
Sep2Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Härnösand?

Härnösand sits at 62.6°N, 17.9°E, 25 m above sea level, in Sweden. The nearest listed city is Sundsvall, 42 km away.

HudiksvallUmeåÖstersundVaasaKorsholmGävle

Topography around Härnösand

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

Within 3 km, the terrain around Härnösand has only modest variations in elevation — a maximum elevation change of 173 m around an average of 42 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 265 m; within 80 km, significant variations in elevation — a maximum elevation change of 495 m.

The land around Härnösand is covered by trees (51%) and water (24%) within 3 km, trees (51%) and water (42%) within 16 km, and trees (60%) and water (35%) within 80 km.

3 km
173 m
16 km
265 m
80 km
495 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Sundsvall 42 km · Örnsköldsvik 83 km · Hudiksvall 109 km · Umeå 177 km · Östersund 178 km · Vaasa 193 km · Korsholm 197 km · Gävle 222 km

Sweden travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 87% of US
price level, 2025
GDP per capita
$63,133
2025
Happiness
7.3 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
3.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 609
Religion
Church of Sweden 54%none or unspecified 37%other 9%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Härnösand (62.6323°, 17.9379°, elevation 25 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).