Halden weather in May

In May, Halden sees average daytime highs of 15°C and overnight lows near 6°C, with 63 mm of precipitation across 11 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 13°C in the first days to 17°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 24 min at the start of May to 17 h 36 min by month's end. Set against the rest of the year, May is Halden's 1st-clearest and 9th-windiest month. For the whole year in context, see Halden's year-round climate.

Daytime high
15°
5th warmest
Overnight low
8th coldest
Precipitation
63 mm
11 wet days
Daylight
16 h 36 min
3:53 AM – 8:29 PM
Cloud cover
59%
1st clearest
Wind
12 km/h
9th windiest
Solar energy
5.44 kWh/m²
Travel score
4.7
out of 10

Halden is urban area in Halden Municipality, Norway.

Air quality
Good
PM2.5 9.2 µg/m³ · 2018
Density
1,565/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 13°C in the first days to 17°C by the end.

A typical May day in Halden reaches about 15°C in the afternoon and slips back to 6°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 22°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1134
2134
3145
4145
5145
6145
7145
8145
9145
10155
11156
12156
13156
14156
15156
16156
17166
18167
19167
20167
21167
22167
23177
24178
25178
26178
27178
28178
29178
30188
31188

How May really feels in Halden

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.

Halden 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 / -3°64116.86.60.0
Feb / -4°498.76.18.80.0
Mar / -2°438.64.611.30.3
Apr10° / 499.21.514.12.5
May15° / 63110.316.64.7
Jun19° / 10°8812.10185.7
Jul21° / 12°8411.7017.46.2
Aug20° / 12°9413.3015.25.8
Sep16° / 7911.4012.64.6
Oct10° / 8212.10.59.82.2
Nov / 7211.92.67.40.3
Dec / -2°6811.64.860.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34654
44654
54753
64753
74753
84852
94852
104753
114753
124753
134753
144654
154654
164555
174555
184555
194456
204456
214456
224456
234555
244555
254654
264555
274654
284654
294654
304753
314753

Chance of precipitation in May

Any precipitationSnow

Halden gets around 63 mm of rain and snow over 11 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 35% and peaks near 36% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1332
2332
3332
4342
5342
6342
7342
8342
9342
10342
11342
12342
13352
14351
15351
16361
17361
18361
19361
20361
21361
22360
23360
24360
25360
26360
27360
28350
29350
30350
31350

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
12991
13991
14991
15991
16991
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27982
28982
29982
30982
31982

Wind in May

Winds average 12 km/h in May.

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

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
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
2912calm
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 24 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 132 minutes over May. Sunrise moves from 4:29 AM to 3:25 AM, and sunset from 7:54 PM to 8:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.44:297:54
215.54:267:57
315.64:247:59
415.74:218:01
515.74:198:04
615.84:168:06
715.94:148:08
816.04:118:11
916.14:098:13
1016.14:068:15
1116.24:048:18
1216.34:028:20
1316.43:598:22
1416.53:578:24
1516.53:558:27
1616.63:538:29
1716.73:508:31
1816.73:488:33
1916.83:468:35
2016.93:448:37
2117.03:428:40
2217.03:408:42
2317.13:388:44
2417.23:368:46
2517.23:358:48
2617.33:338:50
2717.33:318:52
2817.43:298:53
2917.53:288:55
3017.53:268:57
3117.63:258:59

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.44 kWh/m².

For context, solar energy here swings from a low near 0.23 kWh/m² to a high of 5.85 kWh/m² in June across the year — May's 5.44 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.9Bright
34.9Bright
45.0Bright
55.0Bright
65.1Bright
75.1Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.3Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.6Bright
225.6Bright
235.6Bright
245.7Bright
255.7Bright
265.7Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Halden?

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

4.7
Sightseeing
4th-best month of the year
0.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Halden for sightseeing.

What to pack for Halden in May

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

In May, Halden sees daytime highs around 15°C and nights near 6°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Halden 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 at the nearest coast (about 29 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
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr6Bracing
May11Bracing
Jun15Bracing
Jul18Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Halden 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 Halden peaks around June 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 20UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5Moderate
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Halden?

Halden sits at 59.1°N, 11.4°E, 15 m above sea level, in Norway. The nearest listed city is Sarpsborg, 24 km away.

Topography around Halden

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

Within 3 km, the terrain around Halden has only modest variations in elevation — a maximum elevation change of 196 m around an average of 72 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 260 m; within 80 km, significant variations in elevation — a maximum elevation change of 421 m.

The land around Halden is covered by trees (51%) within 3 km, trees (70%) within 16 km, and trees (58%) and water (28%) within 80 km.

3 km
196 m
16 km
260 m
80 km
421 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Sarpsborg 24 km · Fredrikstad 28 km · Moss 54 km · Tønsberg 58 km · Horten 61 km · Sandefjord 67 km · Larvik 78 km · Uddevalla 92 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 Halden (59.1248°, 11.3875°, elevation 15 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).