Moss weather in May

In May, Moss sees average daytime highs of 16°C and overnight lows near 7°C, with 63 mm of precipitation across 10.1 wet days and about 16.6 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 18°C by the end. The sky is clear or mostly clear about 28% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 30 min at the start of May to 17 h 36 min by month's end. Set against the rest of the year, May is Moss's 1st-clearest and 9th-windiest month. For the whole year in context, see Moss's year-round climate.

Daytime high
16°
5th warmest
Overnight low
8th coldest
Precipitation
63 mm
10.1 wet days
Daylight
16 h 42 min
3:54 AM – 8:34 PM
Cloud cover
60%
1st clearest
Wind
10 km/h
9th windiest
Solar energy
5.23 kWh/m²
Travel score
5.1
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 18°C by the end.

A typical May day in Moss 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 11°C and 23°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1145
2145
3145
4145
5145
6155
7155
8156
9156
10156
11156
12156
13166
14166
15167
16167
17167
18167
19177
20177
21178
22178
23178
24188
25188
26188
27189
28189
29189
30199
31199

How May really feels in Moss

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24357
34456
44456
54555
64555
74555
84753
94753
104753
114753
124753
134555
144555
154654
164555
174555
184555
194555
204555
214654
224654
234654
244753
254852
264852
274852
284951
295050
305050
315050

Chance of precipitation in May

Any precipitationSnow

Moss gets around 63 mm of rain and snow over 10.1 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 33% and peaks near 35% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1322
2322
3322
4322
5312
6312
7311
8311
9301
10301
11301
12311
13311
14320
15320
16330
17330
18340
19340
20340
21350
22350
23350
24350
25350
26350
27340
28340
29340
30330
31330

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
13991
14991
15991
16991
17991
18991
19982
20982
21982
22982
23982
24982
25982
26973
27973
28973
29973
30973
31973

Wind in May

Winds average 10 km/h in May.

Across May, 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
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 30 min at the start of May to 17 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 126 minutes over May. Sunrise moves from 4:31 AM to 3:25 AM, and sunset from 7:58 PM to 9:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.54:317:58
215.54:288:01
315.64:258:03
415.74:238:06
515.84:208:08
615.94:188:10
716.04:158:13
816.04:128:15
916.14:108:18
1016.24:088:20
1116.34:058:22
1216.44:038:25
1316.44:008:27
1416.53:588:29
1516.63:568:31
1616.73:548:34
1716.73:518:36
1816.83:498:38
1916.93:478:40
2017.03:458:43
2117.03:438:45
2217.13:418:47
2317.23:398:49
2417.23:378:51
2517.33:358:53
2617.43:338:55
2717.43:328:57
2817.53:308:59
2917.53:289:01
3017.63:279:02
3117.63:259:04

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.23 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 — May's 5.23 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.6Bright
295.6Bright
305.6Bright
315.7Bright
Planning a trip in May

Is May a good time to visit Moss?

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

5.1
Sightseeing
4th-best month of the year
0.9
Beach & pool
5th-best month of the year

May is a reasonable time to visit Moss for sightseeing.

What to pack for Moss in May

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

In May, Moss sees daytime highs around 16°C and nights near 7°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Moss in May

The nearest coast averages about 11°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — 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
May 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).