Semīrom weather in May

In May, Semīrom sees average daytime highs of 21°C and overnight lows near 8°C, with 8 mm of rain across 2.3 wet days and about 13.6 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 24°C by the end. The sky is clear or mostly clear about 66% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of May to 13 h 54 min by month's end. Set against the rest of the year, May is Semīrom's 6th-clearest and 2nd-windiest month. For the whole year in context, see Semīrom's year-round climate.

Daytime high: 21°; 5th warmest
Overnight low: 8°; 8th coldest
Rainfall: 8 mm; 2.3 wet days
Daylight: 13 h 36 min; 5:12 AM – 6:48 PM
Cloud cover: 31%; 6th clearest
Wind: 9 km/h; 2nd windiest
Solar energy: 7.72 kWh/m²
Travel score: 8.2; out of 10

← April Semīrom year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 24°C by the end.

A typical May day in Semīrom reaches about 21°C in the afternoon and slips back to 8°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°C. Set against its neighbours, May runs about 6°C warmer than April and about 6°C cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	18	18	18	19	19	19	19	19	20	20	20	20	20	21	21	21	21	22	22	22	22	23	23	23	23	24	24	24	24	24	25
Avg low (°C)	6	6	6	6	6	6	7	7	7	7	7	7	8	8	8	8	8	8	9	9	9	9	9	9	10	10	10	10	10	10	11

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	19	6
5	19	6
6	19	6
7	19	7
8	19	7
9	20	7
10	20	7
11	20	7
12	20	7
13	20	8
14	21	8
15	21	8
16	21	8
17	21	8
18	22	8
19	22	9
20	22	9
21	22	9
22	23	9
23	23	9
24	23	9
25	23	10
26	24	10
27	24	10
28	24	10
29	24	10
30	24	10
31	25	11

How May really feels in Semīrom

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

heat index over the day's high

Days feeling ≤ 0°C

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.

Semīrom weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	1° / -9°	63	6.8	6.9	10.2	0.0
Feb	3° / -8°	52	6.2	5.7	10.9	0.0
Mar	9° / -3°	52	6.8	3.5	11.8	1.9
Apr	15° / 3°	28	5.5	0.3	12.7	5.3
May	21° / 8°	8	2.3	0	13.6	8.2
Jun	27° / 12°	1	0.2	0	14	8.4
Jul	30° / 15°	1	0.2	0	13.8	6.5
Aug	29° / 13°	0	0	0	13.1	7.2
Sep	26° / 10°	0	0.1	0	12.2	9.2
Oct	20° / 5°	3	1.1	0	11.2	8.2
Nov	12° / -1°	32	4.1	1.3	10.4	3.7
Dec	5° / -6°	48	5.5	4.7	10	0.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	69	69	69	71	72	72	73	75	76	76	78	78	80	80	81	82	83	83	84	84	84	85	86	87	87	89	89	89	91	91	92
Cloudier (%)	31	31	31	29	28	28	27	25	24	24	22	22	20	20	19	18	17	17	16	16	16	15	14	13	13	11	11	11	9	9	8

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	69	31
4	71	29
5	72	28
6	72	28
7	73	27
8	75	25
9	76	24
10	76	24
11	78	22
12	78	22
13	80	20
14	80	20
15	81	19
16	82	18
17	83	17
18	83	17
19	84	16
20	84	16
21	84	16
22	85	15
23	86	14
24	87	13
25	87	13
26	89	11
27	89	11
28	89	11
29	91	9
30	91	9
31	92	8

Chance of precipitation in May

Any precipitation

Semīrom gets around 8 mm of rain over 2.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 7% and peaks near 14% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	14	13	13	13	12	12	11	11	10	10	9	9	8	8	7	7	6	6	5	5	4	4	4	4	3	3	3	3	3	2	2

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	11
8	11
9	10
10	10
11	9
12	9
13	8
14	8
15	7
16	7
17	6
18	6
19	5
20	5
21	4
22	4
23	4
24	4
25	3
26	3
27	3
28	3
29	3
30	2
31	2

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	10	10	10	10	10	10	10	10	10	10	10	10	10	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	9	calm
20	9	calm
21	9	calm
22	9	calm
23	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm
31	9	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 12 min at the start of May to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:25 AM to 5:05 AM, and sunset from 6:37 PM to 6:57 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	13.2	13.2	13.3	13.3	13.3	13.3	13.4	13.4	13.4	13.5	13.5	13.5	13.5	13.5	13.6	13.6	13.6	13.6	13.7	13.7	13.7	13.7	13.7	13.8	13.8	13.8	13.8	13.8	13.8	13.9	13.9
Sunrise (AM)	5:25	5:24	5:23	5:22	5:21	5:20	5:19	5:18	5:17	5:17	5:16	5:15	5:14	5:14	5:13	5:12	5:12	5:11	5:10	5:10	5:09	5:09	5:08	5:08	5:07	5:07	5:06	5:06	5:06	5:05	5:05
Sunset (PM)	6:37	6:38	6:39	6:39	6:40	6:41	6:42	6:42	6:43	6:44	6:44	6:45	6:46	6:46	6:47	6:48	6:48	6:49	6:50	6:50	6:51	6:52	6:52	6:53	6:54	6:54	6:55	6:56	6:56	6:57	6:57

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.2	5:25	6:37
2	13.2	5:24	6:38
3	13.3	5:23	6:39
4	13.3	5:22	6:39
5	13.3	5:21	6:40
6	13.3	5:20	6:41
7	13.4	5:19	6:42
8	13.4	5:18	6:42
9	13.4	5:17	6:43
10	13.5	5:17	6:44
11	13.5	5:16	6:44
12	13.5	5:15	6:45
13	13.5	5:14	6:46
14	13.5	5:14	6:46
15	13.6	5:13	6:47
16	13.6	5:12	6:48
17	13.6	5:12	6:48
18	13.6	5:11	6:49
19	13.7	5:10	6:50
20	13.7	5:10	6:50
21	13.7	5:09	6:51
22	13.7	5:09	6:52
23	13.7	5:08	6:52
24	13.8	5:08	6:53
25	13.8	5:07	6:54
26	13.8	5:07	6:54
27	13.8	5:06	6:55
28	13.8	5:06	6:56
29	13.8	5:06	6:56
30	13.9	5:05	6:57
31	13.9	5:05	6:57

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.72 kWh/m².

For context, solar energy here swings from a low near 3.55 kWh/m² to a high of 8.05 kWh/m² in June across the year — May's 7.72 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	7.3	7.3	7.3	7.4	7.4	7.4	7.5	7.5	7.5	7.6	7.6	7.6	7.7	7.7	7.7	7.8	7.8	7.8	7.8	7.9	7.9	7.9	7.9	7.9	8.0	8.0	8.0	8.0	8.0	8.0	8.1
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	7.3	Intense
2	7.3	Intense
3	7.3	Intense
4	7.4	Intense
5	7.4	Intense
6	7.4	Intense
7	7.5	Intense
8	7.5	Intense
9	7.5	Intense
10	7.6	Intense
11	7.6	Intense
12	7.6	Intense
13	7.7	Intense
14	7.7	Intense
15	7.7	Intense
16	7.8	Intense
17	7.8	Intense
18	7.8	Intense
19	7.8	Intense
20	7.9	Intense
21	7.9	Intense
22	7.9	Intense
23	7.9	Intense
24	7.9	Intense
25	8.0	Intense
26	8.0	Intense
27	8.0	Intense
28	8.0	Intense
29	8.0	Intense
30	8.0	Intense
31	8.1	Intense

Planning a trip in May

Is May a good time to visit Semīrom?

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

8.2

Sightseeing

3rd-best month of the year

5.2

Beach & pool

5th-best month of the year

May is one of the better times to visit Semīrom for general sightseeing.

What to pack for Semīrom in May

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

In May, Semīrom sees daytime highs around 21°C and nights near 8°C. Pack sun protection.

sun protection

UV index in Semīrom in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Semīrom peaks around July 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	4	7	8	8	12	12	13	12	9	8	5	4
Level	Moderate	High	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High	Moderate

	UV index (midday)	Level
Jan	4	Moderate
Feb	7	High
Mar	8	Very high
Apr	8	Very high
May	12	Extreme
Jun	12	Extreme
Jul	13	Extreme
Aug	12	Extreme
Sep	9	Very high
Oct	8	Very high
Nov	5	High
Dec	4	Moderate

Air quality in Semīrom in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Semīrom is worst in April — around 35 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (August, 19 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	23	25	30	35	32	22	25	19	23	24	21	20
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	23	Moderate
Feb	25	Moderate
Mar	30	Moderate
Apr	35	Moderate
May	32	Moderate
Jun	22	Moderate
Jul	25	Moderate
Aug	19	Moderate
Sep	23	Moderate
Oct	24	Moderate
Nov	21	Moderate
Dec	20	Moderate

Location & terrain

Where is Semīrom?

Semīrom sits at 31.4°N, 51.6°E, 2,425 m above sea level, in Iran. The nearest listed city is Dehāqān, 59 km away.

Topography around Semīrom

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

Within 3 km, the terrain around Semīrom has large variations in elevation — a maximum elevation change of 735 m around an average of 2,512 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,409 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,302 m.

The land around Semīrom is covered by grassland (33%), cropland (29%) and bare terrain (20%) within 3 km, grassland (48%), cropland (29%) and bare terrain (22%) within 16 km, and bare terrain (47%) and grassland (34%) within 80 km.

3 km

735 m

grassland 33%

16 km

1,409 m

grassland 48%

80 km

3,302 m

bare terrain 47%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← April Semīrom year-round climate June →Best places to visit in May

May weather nearby: Dehāqān 59 km · Borūjen 66 km · Lordegān 71 km · Shahreẕā 72 km · Mādavān 78 km · Yasuj 83 km · Mobārakeh 104 km · Varnāmkhvāst 106 km

Iran travel facts

Travel advisory: Level 4; Do Not Travel
Power plugs: Type C / F; 220 V · 50 Hz
Prices: ≈ 352% of US; price level, 2025
GDP per capita: $3,924; 2025
Happiness: 5.2 / 10; World Happiness, 2025
Safe drinking water: 94%; of population, 2024
Homicide rate: 2.4; per 100k, 2014
Road deaths: 21.5; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 492
Religion

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 Semīrom (31.4167°, 51.5667°, elevation 2,425 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	19	6
5	19	6
6	19	6
7	19	7
8	19	7
9	20	7
10	20	7
11	20	7
12	20	7
13	20	8
14	21	8
15	21	8
16	21	8
17	21	8
18	22	8
19	22	9
20	22	9
21	22	9
22	23	9
23	23	9
24	23	9
25	23	10
26	24	10
27	24	10
28	24	10
29	24	10
30	24	10
31	25	11

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	69	31
4	71	29
5	72	28
6	72	28
7	73	27
8	75	25
9	76	24
10	76	24
11	78	22
12	78	22
13	80	20
14	80	20
15	81	19
16	82	18
17	83	17
18	83	17
19	84	16
20	84	16
21	84	16
22	85	15
23	86	14
24	87	13
25	87	13
26	89	11
27	89	11
28	89	11
29	91	9
30	91	9
31	92	8

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	11
8	11
9	10
10	10
11	9
12	9
13	8
14	8
15	7
16	7
17	6
18	6
19	5
20	5
21	4
22	4
23	4
24	4
25	3
26	3
27	3
28	3
29	3
30	2
31	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	19	6
5	19	6
6	19	6
7	19	7
8	19	7
9	20	7
10	20	7
11	20	7
12	20	7
13	20	8
14	21	8
15	21	8
16	21	8
17	21	8
18	22	8
19	22	9
20	22	9
21	22	9
22	23	9
23	23	9
24	23	9
25	23	10
26	24	10
27	24	10
28	24	10
29	24	10
30	24	10
31	25	11

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	69	31
4	71	29
5	72	28
6	72	28
7	73	27
8	75	25
9	76	24
10	76	24
11	78	22
12	78	22
13	80	20
14	80	20
15	81	19
16	82	18
17	83	17
18	83	17
19	84	16
20	84	16
21	84	16
22	85	15
23	86	14
24	87	13
25	87	13
26	89	11
27	89	11
28	89	11
29	91	9
30	91	9
31	92	8

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	11
8	11
9	10
10	10
11	9
12	9
13	8
14	8
15	7
16	7
17	6
18	6
19	5
20	5
21	4
22	4
23	4
24	4
25	3
26	3
27	3
28	3
29	3
30	2
31	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	18	6
2	18	6
3	18	6
4	19	6
5	19	6
6	19	6
7	19	7
8	19	7
9	20	7
10	20	7
11	20	7
12	20	7
13	20	8
14	21	8
15	21	8
16	21	8
17	21	8
18	22	8
19	22	9
20	22	9
21	22	9
22	23	9
23	23	9
24	23	9
25	23	10
26	24	10
27	24	10
28	24	10
29	24	10
30	24	10
31	25	11

	Clearer (%)	Cloudier (%)
1	69	31
2	69	31
3	69	31
4	71	29
5	72	28
6	72	28
7	73	27
8	75	25
9	76	24
10	76	24
11	78	22
12	78	22
13	80	20
14	80	20
15	81	19
16	82	18
17	83	17
18	83	17
19	84	16
20	84	16
21	84	16
22	85	15
23	86	14
24	87	13
25	87	13
26	89	11
27	89	11
28	89	11
29	91	9
30	91	9
31	92	8

	Rain chance (%)
1	14
2	13
3	13
4	13
5	12
6	12
7	11
8	11
9	10
10	10
11	9
12	9
13	8
14	8
15	7
16	7
17	6
18	6
19	5
20	5
21	4
22	4
23	4
24	4
25	3
26	3
27	3
28	3
29	3
30	2
31	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100