Moss weather in August

In August, Moss sees average daytime highs of 21°C and overnight lows near 13°C, with 80 mm of rain across 11.9 wet days and about 15.3 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°C by the end. The sky is clear or mostly clear about 24% of the time in August, and the air most often feels dry.

Daylight stretches from about 16 h 30 min at the start of August to 14 hours by month's end. Set against the rest of the year, August is Moss's 4th-clearest and 11th-windiest month. For the whole year in context, see Moss's year-round climate.

Daytime high
21°
2nd warmest
Overnight low
13°
11th coldest
Rainfall
80 mm
11.9 wet days
Daylight
15 h 18 min
4:43 AM – 8:00 PM
Cloud cover
63%
4th clearest
Wind
10 km/h
11th windiest
Solar energy
4.04 kWh/m²
Travel score
6.1
out of 10

Moss is settlement in Moss Municipality, Norway.

Air quality
Good
PM2.5 8.2 µg/m³ · 2019
Density
11,136/km²
people per km²

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 19°C by the end.

A typical August day in Moss reaches about 21°C in the afternoon and slips back to 13°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, August runs about 1°C cooler than July and about 5°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12214
22214
32214
42214
52214
62214
72214
82213
92213
102213
112213
122213
132113
142113
152113
162113
172113
182113
192113
202112
212112
222012
232012
242012
252012
262012
272011
281911
291911
301911
311911

How August really feels in Moss

Once humidity and wind are folded in, August 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

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

Moss weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°6810.67.66.60.0
Feb / -4°508.26.48.70.0
Mar / -2°488.14.911.30.5
Apr11° / 478.51.514.12.7
May16° / 6310.10.216.65.1
Jun20° / 11°7611018.16.0
Jul22° / 13°7710.7017.56.5
Aug21° / 13°8011.9015.36.1
Sep16° / 7810.1012.65.1
Oct10° / 8311.40.69.82.3
Nov / 8211.637.30.3
Dec / -3°6711.15.65.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44654
54654
64753
74654
84654
94753
104753
114753
124753
134753
144852
154852
164852
174753
184753
194753
204852
214753
224654
234654
244654
254654
264654
274654
284555
294555
304555
314654

Chance of precipitation in August

Any precipitation

Moss gets around 80 mm of rain over 11.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
238
338
439
539
640
740
840
940
1040
1140
1240
1340
1440
1539
1639
1739
1838
1938
2038
2137
2237
2337
2437
2536
2636
2735
2835
2935
3035
3134

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 63% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
151409
251409
351409
452399
552399
653389
755378
856368
956368
1057358
1159347
1259347
1360337
1461327
1562326
1663316
1763316
1865305
1965305
2066295
2166295
2268284
2369274
2470264
2571254
2673234
2775223
2877203
2978193
3079183
3180173

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3011calm
3111calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 16 h 30 min at the start of August to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 150 minutes over August. Sunrise moves from 4:08 AM to 5:18 AM, and sunset from 8:39 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.54:088:39
216.44:108:37
316.44:128:34
416.34:158:32
516.24:178:29
616.14:198:27
716.04:228:24
816.04:248:22
915.94:268:19
1015.84:298:16
1115.74:318:14
1215.64:338:11
1315.54:368:08
1415.54:388:06
1515.44:408:03
1615.34:438:00
1715.24:457:57
1815.14:477:55
1915.04:507:52
2014.94:527:49
2114.94:557:46
2214.84:577:43
2314.74:597:40
2414.65:027:37
2514.55:047:34
2614.45:067:31
2714.35:097:29
2814.25:117:26
2914.25:147:23
3014.15:167:20
3114.05:187:17

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.04 kWh/m².

For context, solar energy here swings from a low near 0.21 kWh/m² to a high of 5.62 kWh/m² in June across the year — August's 4.04 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
313.3Moderate
Planning a trip in August

Is August a good time to visit Moss?

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

6.1
Sightseeing
2nd-best month of the year
3.7
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Moss for sightseeing.

What to pack for Moss in August

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

In August, Moss sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Moss in August

The nearest coast averages about 18°C in August — 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 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°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr6Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Moss in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Moss peaks around July 17 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 17UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5Moderate
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Moss?

Moss sits at 59.4°N, 10.7°E, 17 m above sea level, in Norway. The nearest listed city is Horten, 10 km away.

Topography around Moss

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

Within 3 km, the terrain around Moss has only modest variations in elevation — a maximum elevation change of 145 m around an average of 34 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 304 m; within 80 km, large variations in elevation — a maximum elevation change of 891 m.

The land around Moss is covered by trees (39%), water (26%) and artificial surfaces (22%) within 3 km, water (44%) and trees (36%) within 16 km, and trees (63%) and water (24%) within 80 km.

3 km
145 m
16 km
304 m
80 km
891 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Horten 10 km · Tønsberg 23 km · Fredrikstad 29 km · Sarpsborg 31 km · Sandefjord 42 km · Drammen 43 km · Asker 46 km · Oslo 53 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 Moss (59.434°, 10.6577°, elevation 17 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).