Tehran, Iran — Weather in May 2027

Monthly climate averages for Tehran, Iran. Based on 10-year ERA5 reanalysis data.

BSk Cold Semi-Arid
9.6 /10
Excellent

May is an excellent month in Tehran

Climate Overview

Tehran, Iran in May has warm conditions, with highs averaging 27.5°C (82°F). Temperatures drop noticeably between day and night.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 24°C (75°F) at the start to 32°C (89°F) by month's end.

Rainfall is heaviest during the first third of the month, while the last third tends to be drier.

Expect around 11.6h of sunshine at the start of May, increasing to 12.7h by the end.

The warmest days tend to fall around the 31th, averaging 32°C (90°F).

Compared to April, this month is about 6°C warmer with 3 fewer rainy days. Temperatures will rise further into June.

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Monthly May Averages

Temperature
28°C / 14°C
Feels Like
26°C / 12°C
Rain
5 days · 21 mm
Sunshine
12.3h / day
Humidity
37% — Comfortable
Wind
12 km/h
Wind Direction
WSW (249°)
Gusts
40 km/h
Daylight
14.1 h
Cloud Cover
32%
Clear Sky Days
11.6
UV Index
8 — Very High
Dew Point
6°C — Dry
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

36°C 31°C 26°C 21°C 16°C 11°C 6°C 151015202531
HighLow

Daily Precipitation

0 mm 1 mm 2 mm 3 mm 4 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 4 8 12 16 20 151015202531
Wind Speed
Sun Position
Sunrise 05:01
Daylight 14h
Sunset 19:03

What to Expect

Daytime temperatures around 28°C (82°F) are ideal for full-day outdoor exploration.

Rain is uncommon in this month, so most days stay dry from morning through evening.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
7°C / -4°C
Feels Like
4°C / -8°C
Rain
7days (44 mm) Good
Sun
8.5h Good
Humidity
60% Moderate
UV
3.4 Moderate
Snow Days
9days
View Details
February
Poor
Temp
9°C / -3°C
Feels Like
6°C / -7°C
Rain
9days (51 mm) Wet
Sun
9.1h Good
Humidity
62% Muggy
UV
4.4 Moderate
Snow Days
9days
View Details
March
Fair
Temp
15°C / 3°C
Feels Like
13°C / 0°C
Rain
10days (58 mm) Wet
Sun
9.9h Good
Humidity
58% Moderate
UV
5.8 High
Snow Days
6days
View Details
April
Good
Temp
21°C / 9°C
Feels Like
20°C / 6°C
Rain
8days (46 mm) Wet
Sun
11.1h Excellent
Humidity
48% Moderate
UV
7.2 Very High
Snow Days
2days
View Details
May best
Excellent
Temp
28°C / 14°C
Feels Like
26°C / 12°C
Rain
5days (21 mm) Good
Sun
12.3h Excellent
Humidity
37% Comfortable
UV
8 Very High
View Details
June best
Excellent
Temp
34°C / 21°C
Feels Like
32°C / 19°C
Rain
1days (4 mm) Excellent
Sun
12.9h Excellent
Humidity
24% Comfortable
UV
8.5 Very High
View Details
July
Good
Temp
36°C / 24°C
Feels Like
35°C / 23°C
Rain
1days (4 mm) Excellent
Sun
12.9h Excellent
Humidity
24% Comfortable
UV
8.5 Very High
View Details
August best
Excellent
Temp
35°C / 23°C
Feels Like
33°C / 22°C
Rain
0days (1 mm) Excellent
Sun
12.5h Excellent
Humidity
24% Comfortable
UV
8 Very High
View Details
September best
Excellent
Temp
31°C / 19°C
Feels Like
29°C / 17°C
Rain
1days (5 mm) Excellent
Sun
11.1h Excellent
Humidity
26% Comfortable
UV
7 High
View Details
October best
Excellent
Temp
23°C / 12°C
Feels Like
20°C / 10°C
Rain
4days (17 mm) Good
Sun
10.1h Excellent
Humidity
39% Comfortable
UV
5.5 High
View Details
November
Fair
Temp
14°C / 5°C
Feels Like
12°C / 1°C
Rain
6days (30 mm) Good
Sun
8.6h Good
Humidity
55% Moderate
UV
4 Moderate
Snow Days
4days
View Details
December
Poor
Temp
9°C / -1°C
Feels Like
6°C / -5°C
Rain
7days (36 mm) Good
Sun
8.1h Good
Humidity
61% Muggy
UV
3.2 Moderate
Snow Days
7days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 7°C / -4°C 4°C / -8°C 7days (44 mm) Good 8.5h Good 60% Moderate 3.4 Moderate Poor View Details
February 9°C / -3°C 6°C / -7°C 9days (51 mm) Wet 9.1h Good 62% Muggy 4.4 Moderate Poor View Details
March 15°C / 3°C 13°C / 0°C 10days (58 mm) Wet 9.9h Good 58% Moderate 5.8 High Fair View Details
April 21°C / 9°C 20°C / 6°C 8days (46 mm) Wet 11.1h Excellent 48% Moderate 7.2 Very High Good View Details
May best 28°C / 14°C 26°C / 12°C 5days (21 mm) Good 12.3h Excellent 37% Comfortable 8 Very High Excellent View Details
June best 34°C / 21°C 32°C / 19°C 1days (4 mm) Excellent 12.9h Excellent 24% Comfortable 8.5 Very High Excellent View Details
July 36°C / 24°C 35°C / 23°C 1days (4 mm) Excellent 12.9h Excellent 24% Comfortable 8.5 Very High Good View Details
August best 35°C / 23°C 33°C / 22°C 0days (1 mm) Excellent 12.5h Excellent 24% Comfortable 8 Very High Excellent View Details
September best 31°C / 19°C 29°C / 17°C 1days (5 mm) Excellent 11.1h Excellent 26% Comfortable 7 High Excellent View Details
October best 23°C / 12°C 20°C / 10°C 4days (17 mm) Good 10.1h Excellent 39% Comfortable 5.5 High Excellent View Details
November 14°C / 5°C 12°C / 1°C 6days (30 mm) Good 8.6h Good 55% Moderate 4 Moderate Fair View Details
December 9°C / -1°C 6°C / -5°C 7days (36 mm) Good 8.1h Good 61% Muggy 3.2 Moderate Poor View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

Packing List

Breathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

May is typically excellent for visiting Tehran, with average highs of 28°C (82°F) and around 5 rainy days. Tehran, Iran in May has warm conditions, with highs averaging 27.5°C (82°F). Temperatures drop noticeably between day an
Tehran typically sees around 5 rainy days in May with 21 mm (0.8 in) of total rainfall. An umbrella should suffice.
Evenings in Tehran during May are mild at 14°C (58°F). A light cardigan is usually enough.
With highs of 28°C (82°F) and lows of 14°C (58°F) in May, we recommend: Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, May offers some of the best weather conditions in Tehran with comfortable temperatures and lower chances of rain.
The average UV index in Tehran during May is 8 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.
Tehran gets approximately 14 hours of daylight per day in May, with around 12 hours of sunshine.
Snow is uncommon in Tehran during May based on 10-year climate averages.

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