The Frontier Gazette & Almanack
“Fair Warning for Every Town Under the Sky” · Est. 1881
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Iserlohn Weather in May

Iserlohn in May

The short of it: Iserlohn in May averages a high of 18 °C (65 °F) and a low of 8 °C (46 °F), with 68 mm (2.7 in) of rain and about 15 h 34 min of daylight. Rated 4 of 5 for a visit; the best months are May and July. Source: TerraClimate climate normals, 1991–2020.

Average high 18° · low 8° · rain 68 mm · daylight 15 h 34 min

✦✦✦✦ Recommended for a visit · best months: May & July

Thirty years of records give Iserlohn an average May high of 18°, a low of 8° and some 68 mm of rain. Much like April: highs about 18°, nights near 8°. Easy travelling weather. Wet spells are common — about 68 mm, the 11th wettest month.

The sun is up for about 15 h 34 min in mid-May, 107 minutes more than a month before.

For the traveller: pack layers, a wool coat and stout boots, and an oilskin besides. The Almanac rates May 4 of 5 for a visit; it is the best month of the year to come.

Against its neighbours, Iserlohn runs cooler than most and wetter than most in May. Hagen, 16 km to the W, is 1° warmer by day.

May in Iserlohn, by the numbers

Warmth rank
5th warmest of 12
Rain rank
11th wettest of 12
Versus April
4° warmer, 14 mm more rain
Versus June
3° colder
Day–night spread
10°
Snow season
Dec–Feb
Daylight, mid-month
15 h 34 min
Average wind
12 km/h

Neighbouring Towns

May averages · distance by the crow’s flight
TownDistanceHighLowRain
HagenNorth Rhine-Westphalia16 km W19°8°68 mm
UnnaNorth Rhine-Westphalia18 km N19°8°65 mm
LüdenscheidNorth Rhine-Westphalia18 km SSW17°8°74 mm
DortmundNorth Rhine-Westphalia23 km NW20°9°64 mm
WittenNorth Rhine-Westphalia25 km WNW19°9°66 mm
ArnsbergNorth Rhine-Westphalia26 km E18°7°73 mm
LünenNorth Rhine-Westphalia29 km NNW20°8°60 mm
Castrop-RauxelNorth Rhine-Westphalia34 km NW20°9°61 mm

The Almanac · Iserlohn Month by Month

Climate normals 1991–2020 · pick a month
PrecipitationAverage highAverage low
Recommended
The Almanac Speaks
May
✦✦✦✦✦

Much like April: highs about 18°, nights near 8°. Easy travelling weather. Wet spells are common — about 68 mm, the 11th wettest month.

Climate of Iserlohn by month
MonthHighLowRainWindDaylightVisit
January5°0°100 mm15 km/h8 h 20 min✦
February6°-1°80 mm15 km/h9 h 54 min✦
March10°1°70 mm14 km/h11 h 42 min✦✦
April14°4°54 mm12 km/h13 h 47 min✦✦✦
May18°8°68 mm12 km/h15 h 34 min✦✦✦✦
June21°11°76 mm11 km/h16 h 35 min✦✦✦
July23°13°111 mm11 km/h16 h 10 min✦✦✦
August23°12°101 mm11 km/h14 h 35 min✦✦✦
September18°9°80 mm11 km/h12 h 33 min✦✦✦
October14°6°78 mm13 km/h10 h 33 min✦✦
November9°3°89 mm13 km/h8 h 47 min✦
December6°1°103 mm14 km/h7 h 52 min✦

Questions Readers Ask about Iserlohn in May

Answered from the wire & the Almanac

What is the weather like in Iserlohn in May?

Days average 18 °C (65 °F) and nights 8 °C (46 °F), with about 68 mm (2.7 in) of rain over the month. Much like April: highs about 18°, nights near 8°. Easy travelling weather. Wet spells are common — about 68 mm, the 11th wettest month.

Is May a good time to visit Iserlohn?

The Almanac gives May 4 of 5 (recommended). It is the best month of the year to visit.

How long are the days in Iserlohn in May?

In mid-May the sun is up for about 15 h 34 min. The days are lengthening — from 7 h 52 min in December to 16 h 35 min in June.

Does it snow in Iserlohn in May?

Hardly — May nights average 8 °C (46 °F), above freezing.

What should I pack for Iserlohn in May?

Layers, a warm coat and stout boots, plus a good raincoat — it is a wet month.

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The Editor’s Remark

“Weather is the only news that never grows stale. Each morning the sky writes its own front page, and we at Wanted Weather are but its telegraph operators.”— J. Whitmore, Editor