Iran · 1991–2020

Best time to visit
Cheheltan

For Cheheltan, April has the most comfortable weather in our climate comparison. Typical daytime highs are 24.3°C, nights average 12.3°C, and rainfall totals about 24 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.

Best all-round monthApril

Typical daytime high24.3°C

Typical night-time low12.3°C

April rainfall24 mm

Overall comfort

April

Other strong months: October and May

93/100 weather score

Outdoor sightseeing

March

Other strong months: April and November

91/100 weather score

Make the answer personal

Choose the weather
that suits you.

Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.

Daytime high: at least 18°CDaytime high: at most 28°CMonthly rain: no more than 100 mmWet days: no more than 10

3 months fit your choices for Cheheltan

March18.6°C day · 20 mm rain · 2.9 wet days

April24.3°C day · 24 mm rain · 4.1 wet days

October25.8°C day · 5 mm rain · 1.1 wet days

January has the lowest comfort score at 22 out of 100, compared with April at 93. The main reason is that days reach only 9.1°C, 15° below the 24°C the score treats as ideal.

Quick answers

Planning a trip to Cheheltan?

These answers come from the same measured monthly climate record shown on this page.

When is the best time to visit Cheheltan?

April is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 24.3°C and 24 mm of rain.

What is the hottest month in Cheheltan?

July is hottest in this record, with a typical daytime high of 38.1°C and a night-time low of 26.1°C.

Which month has the least rain?

August and September have the lowest monthly rainfall total at 3 mm.

Is this a weather forecast?

No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.

Month by month

See how the weather
changes through the year.

The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.

229.1° / -0.8°

3812.3° / 1.7°

6818.6° / 7°

9324.3° / 12.3°

7330.5° / 18.2°

4536° / 23.7°

3338.1° / 26.1°

4037.1° / 24.4°

6033.2° / 20.4°

9225.8° / 13.9°

5816.2° / 6.2°

3110.7° / 0.9°

Monthly climate evidence for Cheheltan — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	9.1°C	-0.8°C	16 mm	2.7	9 h 59	22	Good coverage
February	12.3°C	1.7°C	19 mm	2.9	10 h 50	38	Good coverage
March	18.6°C	7°C	20 mm	2.9	11 h 51	68	Good coverage
April	24.3°C	12.3°C	24 mm	4.1	13 h 02	93	Good coverage
May	30.5°C	18.2°C	11 mm	2.1	14 h 01	73	Good coverage
June	36°C	23.7°C	13 mm	1.1	14 h 33	45	Good coverage
July	38.1°C	26.1°C	4 mm	0.7	14 h 21	33	Good coverage
August	37.1°C	24.4°C	3 mm	0.6	13 h 30	40	Good coverage
September	33.2°C	20.4°C	3 mm	0.5	12 h 22	60	Good coverage
October	25.8°C	13.9°C	5 mm	1.1	11 h 13	92	Good coverage
November	16.2°C	6.2°C	12 mm	2.2	10 h 14	58	Good coverage
December	10.7°C	0.9°C	23 mm	2.6	9 h 45	31	Good coverage

Records at SEMNAN, 1973–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.2°C28 Jan 2013	-12.6°C16 Jan 2008	21 mm30 Jan 2013	51 mm2006 · driest 0 mm in 2012	25
February	26.4°C23 Feb 2016	-8.8°C12 Feb 2020	45 mm2 Feb 2012	61 mm2012 · driest 0 mm in 2021	25
March	31.0°C30 Mar 2008	-5.6°C12 Mar 2012	20 mm22 Mar 2023	42 mm2007 · driest 0 mm in 2008	27
April	35.4°C30 Apr 2008	1.0°C1 Apr 2007	84 mm18 Apr 1992	110 mm1992 · driest 0 mm in 2001	25
May	38.4°C29 May 2016	6.0°C4 May 1978	30 mm11 May 2016	58 mm2021 · driest 0 mm in 2000	26
June	43.0°C28 Jun 2022	12.0°C3 Jun 1978	89 mm23 Jun 1991	89 mm1991 · driest 0 mm in 2008	30
July	44.4°C8 Jul 2021	16.8°C12 Jul 2004	28 mm12 Jul 2004	43 mm2004 · driest 0 mm in 2005	27
August	43.8°C8 Aug 2024	16.4°C31 Aug 2011	80 mm6 Aug 1990	80 mm1990 · driest 0 mm in 2000	29
September	39.6°C9 Sep 1991	11.4°C28 Sep 1991	32 mm18 Sep 2015	35 mm2015 · driest 0 mm in 1991	28
October	34.4°C4 Oct 2013	3.0°C26 Oct 2013	11 mm26 Oct 2019	28 mm2019 · driest 0 mm in 2005	30
November	27.2°C1 Nov 2017	-9.0°C25 Nov 2016	18 mm20 Nov 2011	46 mm2011 · driest 0 mm in 2000	26
December	20.2°C3 Dec 2010	-10.2°C18 Dec 2007	119 mm9 Dec 2004	128 mm2004 · driest 0 mm in 2017	27

Typical days per month at SEMNAN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	13	<1
February	<1	0	6	<1
March	2	<1	1	<1
April	13	2	0	<1
May	26	17	0	<1
June	25	24	0	<1
July	27	27	0	<1
August	27	27	0	0
September	28	25	0	<1
October	17	5	0	<1
November	<1	0	1	<1
December	0	0	8	<1

How often different weather occurs at SEMNAN, based on its daily record
Month	Dry days reaching 20°C	Wet days	Days with heavy rain	Weeks with 3+ wet days	Typical high by year
January	0%	8%	2%	4%	6.1–11.6°C
February	3%	10%	2%	6%	10.4–14.4°C
March	41%	9%	2%	5%	15.3–21.4°C
April	81%	12%	1%	7%	21.7–27.3°C
May	92%	8%	<1%	4%	29.0–32.2°C
June	96%	4%	<1%	3%	34.5–37.7°C
July	98%	2%	<1%	1%	36.8–39.6°C
August	98%	2%	<1%	2%	36.1–38.2°C
September	98%	2%	<1%	0%	32.1–34.9°C
October	90%	4%	<1%	4%	24.3–28.2°C
November	24%	7%	<1%	3%	14.1–18.8°C
December	<1%	7%	1%	6%	8.4–13.3°C

A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.

The evidence behind this page

Where these figures
come from.

Place identity: GeoNames 33820
NOAA station: IRM00040757 · SEMNAN
Station distance: 15 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 35.63°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

Next step

Choose your month.
Then plan the details.

The weather comparison for Cheheltan is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.

How travel partnerships will work

Keep exploring

Same climate evidence,
different places.

These places read the same station, so their climate numbers are identical. Their setting, population and distance from SEMNAN are not.

SemnanSemnanApril is the strongest comfort month on this shared record · population 124,826Explore the year SemnanSorkhehApril is the strongest comfort month on this shared record · population 9,951Explore the year SemnanLāsjerdApril is the strongest comfort month on this shared record · population 1,024Explore the year SemnanDehāqīnApril is the strongest comfort month on this shared record · population 0Explore the year SemnanEslāmābādApril is the strongest comfort month on this shared record · population 0Explore the year SemnanPoshtehApril is the strongest comfort month on this shared record · population 0Explore the year

Or put two places side by side: Cheheltan vs Semnan