Sīāhkal weather in September
In September, Sīāhkal sees average daytime highs of 26°C and overnight lows near 19°C, with 169 mm of rain across 13.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.
Highs ease over the month, from about 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels muggy.
Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Sīāhkal's 8th-clearest and 10th-windiest month. For the whole year in context, see Sīāhkal's year-round climate.
- Daytime high
- 26°
- 4th warmest
- Overnight low
- 19°
- 9th coldest
- Rainfall
- 169 mm
- 13.8 wet days
- Daylight
- 12 h 12 min
- 5:58 AM – 6:12 PM
- Cloud cover
- 60%
- 8th clearest
- Wind
- 7 km/h
- 10th windiest
- Solar energy
- 4.13 kWh/m²
- Travel score
- 6.0
- out of 10
Sīāhkal is city in Gilan Province, Iran.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 28°C in the first days to 25°C by the end.
A typical September day in Sīāhkal reaches about 26°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 |
| Avg low (°C) | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 21 |
| 2 | 28 | 20 |
| 3 | 28 | 20 |
| 4 | 28 | 20 |
| 5 | 28 | 20 |
| 6 | 28 | 20 |
| 7 | 27 | 20 |
| 8 | 27 | 20 |
| 9 | 27 | 20 |
| 10 | 27 | 19 |
| 11 | 27 | 19 |
| 12 | 27 | 19 |
| 13 | 27 | 19 |
| 14 | 27 | 19 |
| 15 | 26 | 19 |
| 16 | 26 | 19 |
| 17 | 26 | 18 |
| 18 | 26 | 18 |
| 19 | 26 | 18 |
| 20 | 26 | 18 |
| 21 | 26 | 18 |
| 22 | 25 | 18 |
| 23 | 25 | 18 |
| 24 | 25 | 17 |
| 25 | 25 | 17 |
| 26 | 25 | 17 |
| 27 | 25 | 17 |
| 28 | 25 | 17 |
| 29 | 24 | 17 |
| 30 | 24 | 17 |
How September really feels in Sīāhkal
Once humidity and wind are folded in, September 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.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Sīāhkal weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 12° / 3° | 116 | 11.2 | 1.6 | 9.7 | 3.0 |
| Feb | 12° / 4° | 117 | 11.6 | 2.2 | 10.6 | 3.0 |
| Mar | 15° / 7° | 109 | 13.1 | 0.4 | 11.7 | 4.3 |
| Apr | 19° / 11° | 77 | 10.6 | 0 | 12.9 | 5.9 |
| May | 24° / 15° | 47 | 8.5 | 0 | 14 | 7.0 |
| Jun | 28° / 19° | 66 | 7.7 | 0 | 14.5 | 6.7 |
| Jul | 30° / 22° | 76 | 8.7 | 0 | 14.3 | 5.4 |
| Aug | 30° / 22° | 96 | 10.6 | 0 | 13.4 | 5.2 |
| Sep | 26° / 19° | 169 | 13.8 | 0 | 12.3 | 6.0 |
| Oct | 22° / 14° | 188 | 14.6 | 0 | 11 | 6.0 |
| Nov | 17° / 10° | 178 | 13.2 | 0.3 | 10 | 5.0 |
| Dec | 14° / 6° | 125 | 11.3 | 0.6 | 9.5 | 3.8 |
Cloud cover in September
The sky is clear or mostly clear about 30% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 48 | 47 | 47 | 48 | 47 | 46 | 46 | 47 | 46 | 46 | 46 | 46 | 45 | 46 | 44 | 45 | 43 | 43 | 44 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 42 | 42 | 42 |
| Cloudier (%) | 52 | 53 | 53 | 52 | 53 | 54 | 54 | 53 | 54 | 54 | 54 | 54 | 55 | 54 | 56 | 55 | 57 | 57 | 56 | 58 | 58 | 58 | 58 | 57 | 57 | 57 | 57 | 58 | 58 | 58 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 48 | 52 |
| 2 | 47 | 53 |
| 3 | 47 | 53 |
| 4 | 48 | 52 |
| 5 | 47 | 53 |
| 6 | 46 | 54 |
| 7 | 46 | 54 |
| 8 | 47 | 53 |
| 9 | 46 | 54 |
| 10 | 46 | 54 |
| 11 | 46 | 54 |
| 12 | 46 | 54 |
| 13 | 45 | 55 |
| 14 | 46 | 54 |
| 15 | 44 | 56 |
| 16 | 45 | 55 |
| 17 | 43 | 57 |
| 18 | 43 | 57 |
| 19 | 44 | 56 |
| 20 | 42 | 58 |
| 21 | 42 | 58 |
| 22 | 42 | 58 |
| 23 | 42 | 58 |
| 24 | 43 | 57 |
| 25 | 43 | 57 |
| 26 | 43 | 57 |
| 27 | 43 | 57 |
| 28 | 42 | 58 |
| 29 | 42 | 58 |
| 30 | 42 | 58 |
Chance of precipitation in September
Sīāhkal gets around 169 mm of rain over 13.8 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 46% and peaks near 50% on the wettest days. The odds climb 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 41 | 42 | 42 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 |
| Rain chance (%) | |
|---|---|
| 1 | 41 |
| 2 | 42 |
| 3 | 42 |
| 4 | 43 |
| 5 | 43 |
| 6 | 44 |
| 7 | 44 |
| 8 | 44 |
| 9 | 45 |
| 10 | 45 |
| 11 | 45 |
| 12 | 45 |
| 13 | 45 |
| 14 | 45 |
| 15 | 46 |
| 16 | 46 |
| 17 | 46 |
| 18 | 46 |
| 19 | 47 |
| 20 | 47 |
| 21 | 47 |
| 22 | 47 |
| 23 | 48 |
| 24 | 48 |
| 25 | 48 |
| 26 | 49 |
| 27 | 49 |
| 28 | 49 |
| 29 | 50 |
| 30 | 50 |
Humidity in September
Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the muggy band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 2 |
| Comfortable (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 14 | 15 |
| Humid (%) | 11 | 12 | 13 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 30 | 31 | 32 | 33 | 35 | 36 | 38 | 39 | 40 | 42 |
| Muggy (%) | 49 | 49 | 48 | 48 | 48 | 48 | 49 | 49 | 51 | 51 | 53 | 53 | 53 | 54 | 55 | 57 | 56 | 56 | 57 | 56 | 54 | 53 | 52 | 51 | 49 | 47 | 44 | 42 | 39 | 36 |
| Oppressive (%) | 33 | 32 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 23 | 22 | 21 | 19 | 18 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 5 | 4 |
| Miserable (%) | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 0 | 1 | 11 | 49 | 33 | 7 |
| 2 | 0 | 1 | 12 | 49 | 32 | 6 |
| 3 | 0 | 1 | 13 | 48 | 32 | 6 |
| 4 | 0 | 1 | 15 | 48 | 31 | 5 |
| 5 | 0 | 1 | 16 | 48 | 30 | 5 |
| 6 | 0 | 1 | 17 | 48 | 29 | 4 |
| 7 | 0 | 1 | 18 | 49 | 28 | 4 |
| 8 | 0 | 1 | 19 | 49 | 27 | 3 |
| 9 | 0 | 1 | 20 | 51 | 26 | 2 |
| 10 | 0 | 1 | 21 | 51 | 25 | 2 |
| 11 | 0 | 1 | 22 | 53 | 23 | 1 |
| 12 | 0 | 1 | 23 | 53 | 22 | 1 |
| 13 | 0 | 1 | 24 | 53 | 21 | 1 |
| 14 | 0 | 2 | 24 | 54 | 19 | 1 |
| 15 | 0 | 2 | 25 | 55 | 18 | 0 |
| 16 | 0 | 2 | 25 | 57 | 16 | 0 |
| 17 | 0 | 3 | 26 | 56 | 15 | 0 |
| 18 | 0 | 3 | 27 | 56 | 14 | 0 |
| 19 | 0 | 3 | 27 | 57 | 13 | 0 |
| 20 | 0 | 4 | 28 | 56 | 12 | 0 |
| 21 | 0 | 5 | 30 | 54 | 11 | 0 |
| 22 | 0 | 6 | 31 | 53 | 10 | 0 |
| 23 | 0 | 7 | 32 | 52 | 9 | 0 |
| 24 | 0 | 8 | 33 | 51 | 8 | 0 |
| 25 | 0 | 9 | 35 | 49 | 7 | 0 |
| 26 | 1 | 10 | 36 | 47 | 6 | 0 |
| 27 | 1 | 11 | 38 | 44 | 6 | 0 |
| 28 | 1 | 12 | 39 | 42 | 5 | 0 |
| 29 | 2 | 14 | 40 | 39 | 5 | 0 |
| 30 | 2 | 15 | 42 | 36 | 4 | 0 |
Wind in September
Winds average 7 km/h in September.
Across September, daily wind ranges from about 6 km/h on the calmest days to 7 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over September. Sunrise moves from 5:45 AM to 6:10 AM, and sunset from 6:35 PM to 5:50 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.7 |
| Sunrise (AM) | 5:45 | 5:46 | 5:47 | 5:48 | 5:49 | 5:49 | 5:50 | 5:51 | 5:52 | 5:53 | 5:54 | 5:54 | 5:55 | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:00 | 6:01 | 6:02 | 6:03 | 6:04 | 6:05 | 6:06 | 6:06 | 6:07 | 6:08 | 6:09 | 6:10 |
| Sunset (PM) | 6:35 | 6:34 | 6:32 | 6:31 | 6:29 | 6:28 | 6:26 | 6:25 | 6:23 | 6:21 | 6:20 | 6:18 | 6:17 | 6:15 | 6:13 | 6:12 | 6:10 | 6:09 | 6:07 | 6:05 | 6:04 | 6:02 | 6:01 | 5:59 | 5:58 | 5:56 | 5:54 | 5:53 | 5:51 | 5:50 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.8 | 5:45 | 6:35 |
| 2 | 12.8 | 5:46 | 6:34 |
| 3 | 12.8 | 5:47 | 6:32 |
| 4 | 12.7 | 5:48 | 6:31 |
| 5 | 12.7 | 5:49 | 6:29 |
| 6 | 12.6 | 5:49 | 6:28 |
| 7 | 12.6 | 5:50 | 6:26 |
| 8 | 12.6 | 5:51 | 6:25 |
| 9 | 12.5 | 5:52 | 6:23 |
| 10 | 12.5 | 5:53 | 6:21 |
| 11 | 12.4 | 5:54 | 6:20 |
| 12 | 12.4 | 5:54 | 6:18 |
| 13 | 12.4 | 5:55 | 6:17 |
| 14 | 12.3 | 5:56 | 6:15 |
| 15 | 12.3 | 5:57 | 6:13 |
| 16 | 12.2 | 5:58 | 6:12 |
| 17 | 12.2 | 5:59 | 6:10 |
| 18 | 12.2 | 6:00 | 6:09 |
| 19 | 12.1 | 6:00 | 6:07 |
| 20 | 12.1 | 6:01 | 6:05 |
| 21 | 12.0 | 6:02 | 6:04 |
| 22 | 12.0 | 6:03 | 6:02 |
| 23 | 11.9 | 6:04 | 6:01 |
| 24 | 11.9 | 6:05 | 5:59 |
| 25 | 11.9 | 6:06 | 5:58 |
| 26 | 11.8 | 6:06 | 5:56 |
| 27 | 11.8 | 6:07 | 5:54 |
| 28 | 11.7 | 6:08 | 5:53 |
| 29 | 11.7 | 6:09 | 5:51 |
| 30 | 11.7 | 6:10 | 5:50 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.13 kWh/m².
For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 6.29 kWh/m² in June across the year — September's 4.13 kWh/m² falls in the middle.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.8 | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.7 | 3.6 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.8 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.6 | Bright |
| 5 | 4.6 | Bright |
| 6 | 4.5 | Bright |
| 7 | 4.5 | Bright |
| 8 | 4.4 | Bright |
| 9 | 4.4 | Bright |
| 10 | 4.3 | Bright |
| 11 | 4.3 | Bright |
| 12 | 4.3 | Bright |
| 13 | 4.2 | Bright |
| 14 | 4.2 | Bright |
| 15 | 4.1 | Bright |
| 16 | 4.1 | Bright |
| 17 | 4.0 | Bright |
| 18 | 4.0 | Bright |
| 19 | 4.0 | Moderate |
| 20 | 4.0 | Moderate |
| 21 | 3.9 | Moderate |
| 22 | 3.9 | Moderate |
| 23 | 3.9 | Moderate |
| 24 | 3.8 | Moderate |
| 25 | 3.8 | Moderate |
| 26 | 3.8 | Moderate |
| 27 | 3.7 | Moderate |
| 28 | 3.7 | Moderate |
| 29 | 3.7 | Moderate |
| 30 | 3.6 | Moderate |
Is September a good time to visit Sīāhkal?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Sīāhkal for sightseeing.
What to pack for Sīāhkal in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Sīāhkal sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.
Sea temperature near Sīāhkal in September
The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 33 km away) is warmest in August at about 28°C and coldest in February near 10°C.
It's comfortable for a long swim from May 24 to Nov 4 — about 5.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 12 | 10 | 11 | 13 | 19 | 24 | 27 | 28 | 26 | 23 | 19 | 15 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Warm | Warm | Warm | Warm | Refreshing | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 12 | Bracing |
| Feb | 10 | Bracing |
| Mar | 11 | Bracing |
| Apr | 13 | Bracing |
| May | 19 | Cool |
| Jun | 24 | Warm |
| Jul | 27 | Warm |
| Aug | 28 | Warm |
| Sep | 26 | Warm |
| Oct | 23 | Refreshing |
| Nov | 19 | Cool |
| Dec | 15 | Bracing |
UV index in Sīāhkal in September
Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sīāhkal peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 4 | 6 | 8 | 8 | 9 | 8 | 6 | 5 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Sīāhkal in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Sīāhkal is worst in March — around 27 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (July, 14 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) | 21 | 21 | 27 | 23 | 21 | 17 | 14 | 20 | 25 | 23 | 21 | 20 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 21 | Moderate |
| Feb | 21 | Moderate |
| Mar | 27 | Moderate |
| Apr | 23 | Moderate |
| May | 21 | Moderate |
| Jun | 17 | Moderate |
| Jul | 14 | Moderate |
| Aug | 20 | Moderate |
| Sep | 25 | Moderate |
| Oct | 23 | Moderate |
| Nov | 21 | Moderate |
| Dec | 20 | Moderate |
Where is Sīāhkal?
Sīāhkal sits at 37.2°N, 49.9°E, 47 m above sea level, in Iran. The nearest listed city is Lāhījān, 13 km away.
Topography around Sīāhkal
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sīāhkal.
Within 3 km, the terrain around Sīāhkal has only modest variations in elevation — a maximum elevation change of 148 m around an average of 44 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,255 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,710 m.
The land around Sīāhkal is covered by trees (40%) and cropland (39%) within 3 km, trees (56%) and cropland (34%) within 16 km, and water (35%), trees (25%) and grassland (25%) within 80 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 Sīāhkal (37.1533°, 49.8714°, elevation 47 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. 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).