Koz’modem’yansk weather in September

In September, Koz’modem’yansk sees average daytime highs of 15°C and overnight lows near 9°C, with 59 mm of precipitation across 10.9 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 12°C by the end. The sky is clear or mostly clear about 16% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of September to 11 h 18 min by month's end. Set against the rest of the year, September is Koz’modem’yansk's 6th-clearest and 7th-windiest month. For the whole year in context, see Koz’modem’yansk's year-round climate.

Daytime high
15°
5th warmest
Overnight low
9th coldest
Precipitation
59 mm
10.9 wet days
Daylight
12 h 30 min
5:34 AM – 6:02 PM
Cloud cover
72%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
2.58 kWh/m²
Travel score
4.4
out of 10

Koz’modem’yansk is human settlement in Kozmodemyansk Urban Okrug, Mari El Republic, Russia.

Density
1,693/km²
people per km²
Founded
1583

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 12°C by the end.

A typical September day in Koz’modem’yansk reaches about 15°C in the afternoon and slips back to 9°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 22°C. Set against its neighbours, September runs about 6°C cooler than August and about 8°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11911
21811
31811
41811
51811
61810
71710
81710
91710
101710
11169
12169
13169
14169
15169
16158
17158
18158
19158
20148
21147
22147
23147
24137
25137
26137
27136
28136
29126
30126

How September really feels in Koz’modem’yansk

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.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Koz’modem’yansk weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-7° / -12°3710.312.27.30.0
Feb-6° / -12°3189.29.10.0
Mar / -7°358.38.311.40.0
Apr / 367.92.213.92.0
May17° / 459.20.3165.6
Jun22° / 13°7011.3017.36.3
Jul24° / 16°7111016.86.8
Aug22° / 14°5910.4014.96.5
Sep15° / 5910.90.112.54.4
Oct / 5812.12.510.11.2
Nov-0° / -4°4310.27.87.90.0
Dec-5° / -10°4010.711.36.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% 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 70%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13466
23466
33367
43268
53367
63169
73169
83268
93070
103070
113070
123070
133070
143070
153070
163070
173070
183169
193169
203070
213070
223070
232971
242971
252872
262971
272872
282872
292773
302773

Chance of precipitation in September

Any precipitationSnow

Koz’modem’yansk gets around 59 mm of rain and snow over 10.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 36% and peaks near 37% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1360
2360
3360
4360
5360
6360
7370
8370
9370
10370
11370
12370
13370
14370
15370
16370
17370
18360
19360
20360
21360
22360
23360
24361
25361
26361
27361
28361
29371
30372

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
176204
278193
379183
480173
583152
684142
786131
887121
988111
109091
119280
129370
139460
149550
159640
169640
179730
189820
199820
209820
219910
229910
239910
249910
259910
2610000
2710000
2810000
2910000
3010000

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 42 min at the start of September to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 144 minutes over September. Sunrise moves from 5:04 AM to 6:03 AM, and sunset from 6:43 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:046:43
213.65:066:41
313.55:086:38
413.45:106:35
513.35:126:33
613.35:146:30
713.25:166:27
813.15:186:24
913.05:206:21
1012.95:226:19
1112.95:246:16
1212.85:266:13
1312.75:286:10
1412.65:306:08
1512.55:326:05
1612.55:346:02
1712.45:365:59
1812.35:385:56
1912.25:405:54
2012.15:425:51
2112.15:445:48
2212.05:465:45
2311.95:495:42
2411.85:515:40
2511.75:535:37
2611.75:555:34
2711.65:575:31
2811.55:595:29
2911.46:015:26
3011.36:035:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.58 kWh/m².

For context, solar energy here swings from a low near 0.36 kWh/m² to a high of 5.65 kWh/m² in June across the year — September's 2.58 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.2Moderate
43.2Moderate
53.1Moderate
63.0Moderate
73.0Moderate
82.9Moderate
92.9Moderate
102.8Moderate
112.8Moderate
122.7Moderate
132.7Moderate
142.6Moderate
152.6Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.4Moderate
202.4Moderate
212.3Moderate
222.3Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.1Moderate
272.1Moderate
282.0Moderate
292.0Dim
301.9Dim
Planning a trip in September

Is September a good time to visit Koz’modem’yansk?

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

4.4
Sightseeing
5th-best month of the year
0.7
Beach & pool
5th-best month of the year

September is a reasonable time to visit Koz’modem’yansk for sightseeing.

What to pack for Koz’modem’yansk in September

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

In September, Koz’modem’yansk sees daytime highs around 15°C and nights near 9°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

UV index in Koz’modem’yansk in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Koz’modem’yansk peaks around June 20 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 20UV 6Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May4Moderate
Jun6High
Jul6High
Aug4Moderate
Sep4Moderate
Oct1Low
Nov1Low
Dec0Low
Location & terrain

Where is Koz’modem’yansk?

Koz’modem’yansk sits at 56.3°N, 46.6°E, 140 m above sea level, in Russia. The nearest listed city is Cheboksary, 48 km away.

Topography around Koz’modem’yansk

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Koz’modem’yansk.

Within 3 km, the terrain around Koz’modem’yansk has only modest variations in elevation — a maximum elevation change of 121 m around an average of 104 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 143 m; within 80 km, only modest variations in elevation — a maximum elevation change of 178 m.

The land around Koz’modem’yansk is covered by water (40%) and trees (26%) within 3 km, trees (37%) and water (37%) within 16 km, and trees (60%) within 80 km.

3 km
121 m
16 km
143 m
80 km
178 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Cheboksary 48 km · Novocheboksarsk 62 km · Medvedevo 83 km · Yoshkar-Ola 89 km · Shumerlya 93 km · Lyskovo 100 km · Kanash 108 km · Sergach 113 km

Russia travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$17,547
2025
Happiness
5.8 / 10
World Happiness, 2025
Safe drinking water
76%
of population, 2024
Homicide rate
6.8
per 100k, 2021
Road deaths
12
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 521
Religion
other Christian 2%

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 Koz’modem’yansk (56.3321°, 46.5606°, elevation 140 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).