Gamla Uppsala weather in September

In September, Gamla Uppsala sees average daytime highs of 16°C and overnight lows near 7°C, with 48 mm of rain across 9.1 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 18°C in the first days to 13°C by the end. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of September to 11 h 12 min by month's end. Set against the rest of the year, September is Gamla Uppsala's 6th-clearest and 7th-windiest month. For the whole year in context, see Gamla Uppsala's year-round climate.

Daytime high
16°
4th warmest
Overnight low
9th coldest
Rainfall
48 mm
9.1 wet days
Daylight
12 h 30 min
5:28 AM – 6:00 PM
Cloud cover
67%
6th clearest
Wind
12 km/h
7th windiest
Solar energy
2.52 kWh/m²
Travel score
4.8
out of 10

Gamla Uppsala is urban area of 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 18°C in the first days to 13°C by the end.

A typical September day in Gamla Uppsala reaches about 16°C in the afternoon and slips back to 7°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 20°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°151015202530
Avg high (°C)Avg low (°C)
1189
2189
3189
4189
5189
6189
7179
8178
9178
10178
11178
12168
13168
14168
15167
16167
17167
18157
19157
20157
21157
22156
23146
24146
25146
26146
27146
28136
29135
30135

How September really feels in Gamla Uppsala

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.

Gamla Uppsala 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-0° / -5°348.26.36.40.0
Feb / -6°287.56.58.70.0
Mar / -4°297.55.211.30.2
Apr10° / 358.2214.12.3
May15° / 48100.216.74.7
Jun19° / 7112.2018.35.7
Jul22° / 12°7211.4017.76.3
Aug21° / 11°7612.6015.36.0
Sep16° / 489.1012.64.8
Oct / 509.30.59.82.0
Nov / -0°439.73.47.20.1
Dec / -4°419.96.45.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23565
33664
43664
53664
63763
73862
83862
93961
103862
113862
123862
133961
143862
153862
163763
173862
183961
193862
203763
213763
223763
233763
243763
253862
263763
273664
283664
293664
303664

Chance of precipitation in September

Any precipitation

Gamla Uppsala gets around 48 mm of rain over 9.1 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 31% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
235
334
433
533
632
732
831
931
1031
1131
1231
1331
1431
1531
1631
1731
1831
1931
2031
2131
2230
2330
2430
2530
2630
2730
2830
2930
3030

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
182153
283143
384133
486122
587112
689101
79091
89091
99181
109370
119370
129460
139460
149550
159550
169640
179640
189730
199730
209730
219730
229730
239820
249820
259820
269820
279820
289820
299820
309910

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 54 min at the start of September to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 162 minutes over September. Sunrise moves from 4:52 AM to 6:02 AM, and sunset from 6:47 PM to 5:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:526:47
213.84:546:44
313.74:566:41
413.64:596:37
513.65:016:34
613.55:046:31
713.45:066:28
813.35:096:25
913.25:116:22
1013.15:136:19
1113.05:166:16
1212.95:186:12
1312.85:216:09
1412.75:236:06
1512.65:256:03
1612.55:286:00
1712.45:305:57
1812.35:335:53
1912.35:355:50
2012.25:375:47
2112.15:405:44
2212.05:425:41
2311.95:455:38
2411.85:475:35
2511.75:505:31
2611.65:525:28
2711.55:545:25
2811.45:575:22
2911.35:595:19
3011.26:025:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.52 kWh/m².

For context, solar energy here swings from a low near 0.18 kWh/m² to a high of 5.56 kWh/m² in June across the year — September's 2.52 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.2Moderate
23.1Moderate
33.1Moderate
43.0Moderate
53.0Moderate
63.0Moderate
72.9Moderate
82.9Moderate
92.8Moderate
102.8Moderate
112.7Moderate
122.7Moderate
132.6Moderate
142.6Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.4Moderate
192.4Moderate
202.3Moderate
212.3Moderate
222.2Moderate
232.2Moderate
242.1Moderate
252.1Moderate
262.0Moderate
272.0Dim
281.9Dim
291.9Dim
301.8Dim
Planning a trip in September

Is September a good time to visit Gamla Uppsala?

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

4.8
Sightseeing
4th-best month of the year
0.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Gamla Uppsala for sightseeing.

What to pack for Gamla Uppsala in September

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

In September, Gamla Uppsala sees daytime highs around 16°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Gamla Uppsala in September

The nearest coast averages about 14°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 67 km away) 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°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr2Bracing
May6Bracing
Jun11Bracing
Jul15Cool
Aug17Cool
Sep14Bracing
Oct9Bracing
Nov6Bracing
Dec4Bracing

UV index in Gamla Uppsala in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gamla Uppsala peaks around June 17 at about 5 (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 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5Moderate
Jul4Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Gamla Uppsala?

Gamla Uppsala sits at 59.9°N, 17.6°E, 34 m above sea level, in Sweden. The nearest listed city is Uppsala, 4.0 km away.

Topography around Gamla Uppsala

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

Within 3 km, the terrain around Gamla Uppsala has only modest variations in elevation — a maximum elevation change of 49 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 77 m; within 80 km, only modest variations in elevation — a maximum elevation change of 222 m.

The land around Gamla Uppsala is covered by cropland (43%) and grassland (24%) within 3 km, trees (50%) and cropland (27%) within 16 km, and trees (60%) within 80 km.

3 km
49 m
16 km
77 m
80 km
222 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Uppsala 4.0 km · Märsta 33 km · Enköping 43 km · Upplands Väsby 45 km · Vallentuna 47 km · Jakobsberg 54 km · Sollentuna 55 km · Täby 56 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 Gamla Uppsala (59.8982°, 17.6339°, elevation 34 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).