Porsgrunn weather in July

In July, Porsgrunn sees average daytime highs of 20°C and overnight lows near 12°C, with 99 mm of rain across 12.5 wet days and about 17.4 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 24% of the time in July, and the air most often feels dry.

Daylight stretches from about 18 h 06 min at the start of July to 16 h 30 min by month's end. Set against the rest of the year, July is Porsgrunn's 2nd-clearest and 12th-windiest month. For the whole year in context, see Porsgrunn's year-round climate.

Daytime high
20°
1st warmest
Overnight low
12°
12th coldest
Rainfall
99 mm
12.5 wet days
Daylight
17 h 30 min
3:42 AM – 9:12 PM
Cloud cover
62%
2nd clearest
Wind
9 km/h
12th windiest
Solar energy
5.41 kWh/m²
Travel score
5.9
out of 10

Porsgrunn is town in Porsgrunn Municipality, Norway.

Air quality
Good
PM2.5 7.4 µg/m³ · 2019
Founded
1807

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical July day in Porsgrunn reaches about 20°C in the afternoon and slips back to 12°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, July runs about 2°C warmer than June and about 1°C warmer than August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12011
22011
32011
42011
52012
62012
72012
82012
92012
102012
112012
122012
132012
142012
152012
162012
172112
182112
192112
202112
212112
222112
232112
242112
252113
262113
272113
282113
292113
302113
312113

How July really feels in Porsgrunn

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.

Porsgrunn weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°9212.210.36.60.0
Feb / -5°629.38.48.80.0
Mar / -3°638.76.611.30.2
Apr10° / 599.43.514.12.1
May15° / 7410.80.616.64.3
Jun18° / 10°9412.50185.5
Jul20° / 12°9912.5017.45.9
Aug20° / 12°10613.4015.25.7
Sep15° / 10111.5012.64.4
Oct10° / 10712.51.59.81.9
Nov / 108135.37.40.1
Dec / -3°8412.285.90.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 21% of July, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34456
44456
54555
64555
74555
84654
94555
104555
114654
124555
134555
144456
154456
164654
174555
184555
194555
204456
214555
224555
234555
244555
254555
264555
274555
284456
294555
304555
314555

Chance of precipitation in July

Any precipitation

Porsgrunn gets around 99 mm of rain over 12.5 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 41% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
143
243
342
442
542
642
742
842
942
1042
1142
1242
1342
1442
1542
1642
1742
1842
1941
2041
2140
2240
2340
2440
2540
2640
2740
2840
2940
3040
3140

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
185141
284151
383161
483161
582171
681181
780182
879192
979192
1078202
1177212
1277212
1376222
1476222
1574233
1673243
1772253
1871263
1970273
2068284
2167294
2266304
2364315
2463325
2562335
2661345
2760346
2859356
2959356
3059356
3159356

Wind in July

Winds average 9 km/h in July, the calmest month.

Across July, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 18 h 06 min at the start of July to 16 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over July. Sunrise moves from 3:22 AM to 4:11 AM, and sunset from 9:28 PM to 8:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
118.13:229:28
218.13:229:27
318.13:239:27
418.03:249:26
518.03:269:25
618.03:279:25
717.93:289:24
817.93:299:23
917.93:319:22
1017.83:329:21
1117.83:339:19
1217.73:359:18
1317.73:379:17
1417.63:389:15
1517.63:409:14
1617.53:429:12
1717.53:439:11
1817.43:459:09
1917.33:479:08
2017.33:499:06
2117.23:519:04
2217.23:539:02
2317.13:559:00
2417.03:578:58
2517.03:598:56
2616.94:018:54
2716.84:038:52
2816.84:058:50
2916.74:078:48
3016.64:098:46
3116.54:118:43

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.41 kWh/m².

For context, solar energy here swings from a low near 0.24 kWh/m² to a high of 5.78 kWh/m² in June across the year — July's 5.41 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.4Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.3Bright
205.2Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in July

Is July a good time to visit Porsgrunn?

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
3.3
Beach & pool
1st-best month of the year

July is a reasonable time to visit Porsgrunn for sightseeing.

What to pack for Porsgrunn in July

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

In July, Porsgrunn sees daytime highs around 20°C and nights near 12°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Porsgrunn in July

The nearest coast averages about 17°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 30 km away) is warmest in August at about 18°C and coldest in February near 3°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
Jan5Bracing
Feb3Bracing
Mar4Bracing
Apr6Bracing
May11Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Porsgrunn 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 Porsgrunn peaks around July 20 at about 5 (moderate) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 20UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Porsgrunn?

Porsgrunn sits at 59.1°N, 9.7°E, 9 m above sea level, in Norway. The nearest listed city is Skien, 8.0 km away.

Topography around Porsgrunn

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

Within 3 km, the terrain around Porsgrunn has significant variations in elevation — a maximum elevation change of 254 m around an average of 48 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 548 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,422 m.

The land around Porsgrunn is covered by trees (46%) and artificial surfaces (23%) within 3 km, trees (73%) within 16 km, and trees (59%) and water (31%) within 80 km.

3 km
254 m
16 km
548 m
80 km
1,422 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Skien 8.0 km · Larvik 24 km · Sandefjord 32 km · Tønsberg 45 km · Horten 56 km · Kongsberg 59 km · Moss 66 km · Fredrikstad 73 km

Norway travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 91% of US
price level, 2025
GDP per capita
$94,594
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
2.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 613
Religion
Church of Norway 68%other Christian 4%Muslim 3%Roman Catholic 3%

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 Porsgrunn (59.1405°, 9.6561°, elevation 9 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).