Biysk weather in September

In September, Biysk sees average daytime highs of 18°C and overnight lows near 7°C, with 49 mm of precipitation across 9.9 wet days and about 12.4 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 15°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Biysk's 3rd-clearest and 5th-windiest month. For the whole year in context, see Biysk's year-round climate.

Daytime high
18°
5th warmest
Overnight low
8th coldest
Precipitation
49 mm
9.9 wet days
Daylight
12 h 24 min
6:01 AM – 6:26 PM
Cloud cover
59%
3rd clearest
Wind
10 km/h
5th windiest
Solar energy
3.5 kWh/m²
Travel score
5.7
out of 10

Biysk is city in southeastern Russia.

Density
739/km²
people per km²
Founded
1709

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 21°C in the first days to 15°C by the end.

A typical September day in Biysk reaches about 18°C in the afternoon and slips back to 7°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 25°C. Set against its neighbours, September runs about 6°C cooler than August and about 8°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12210
22110
3219
4219
5219
6209
7208
8208
9208
10198
11197
12197
13197
14187
15187
16186
17186
18176
19176
20176
21175
22165
23165
24165
25164
26154
27154
28154
29154
30143

How September really feels in Biysk

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.

Biysk weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-12° / -20°2168.380.0
Feb-8° / -18°195.66.79.50.0
Mar-0° / -11°256.76.411.50.0
Apr11° / -0°4492.713.62.9
May19° / 6110.90.315.56.0
Jun24° / 13°6311.3016.56.6
Jul26° / 16°7412.7016.16.2
Aug24° / 13°6210.4014.56.8
Sep18° / 499.90.212.45.7
Oct10° / 4910.33.110.32.1
Nov-2° / -9°49119.98.50.0
Dec-9° / -17°349.211.27.50.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55050
65050
75050
85050
94951
104852
114951
124753
134753
144654
154456
164357
174258
184258
194258
204159
214060
223961
233961
243961
253961
263961
274060
283961
293961
303961

Chance of precipitation in September

Any precipitationSnow

Biysk gets around 49 mm of rain and snow over 9.9 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 33% and peaks near 34% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202530
Rain chance (%)Snow chance (%)
1340
2340
3340
4340
5340
6340
7340
8340
9330
10330
11330
12330
13330
14330
15330
16340
17340
18340
19340
20341
21331
22331
23331
24321
25321
26322
27322
28312
29312
30313

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19091
29181
39271
49361
59451
69541
79631
89730
99820
109820
119910
129910
139910
149910
159910
1610000
1710000
1810000
1910000
2010000
2110000
2210000
2310000
2410000
2510000
2610000
2710000
2810000
2910000
3010000

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1511calm
1611calm
1711calm
1811calm
1911calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 5:36 AM to 6:26 AM, and sunset from 7:02 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:367:02
213.45:377:00
313.35:396:57
413.25:416:55
513.25:426:53
613.15:446:50
713.05:466:48
813.05:486:45
912.95:496:43
1012.85:516:40
1112.85:536:38
1212.75:556:36
1312.65:566:33
1412.55:586:31
1512.56:006:28
1612.46:016:26
1712.36:036:23
1812.36:056:21
1912.26:076:18
2012.16:086:16
2112.16:106:13
2212.06:126:11
2311.96:146:08
2411.86:156:06
2511.86:176:03
2611.76:196:01
2711.66:215:58
2811.66:225:56
2911.56:245:54
3011.46:265:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.5 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 6.32 kWh/m² in June across the year — September's 3.5 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.2Bright
34.2Bright
44.1Bright
54.1Bright
64.0Bright
74.0Bright
83.9Moderate
93.9Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.2Moderate
213.2Moderate
223.1Moderate
233.1Moderate
243.0Moderate
252.9Moderate
262.9Moderate
272.8Moderate
282.8Moderate
292.7Moderate
302.6Moderate
Planning a trip in September

Is September a good time to visit Biysk?

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

5.7
Sightseeing
5th-best month of the year
2.0
Beach & pool
5th-best month of the year

September is a reasonable time to visit Biysk for sightseeing.

What to pack for Biysk in September

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

In September, Biysk sees daytime highs around 18°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

UV index in Biysk 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 Biysk peaks around July 19 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 19UV 6Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar2Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low

Air quality in Biysk in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Biysk is worst in April — around 15 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (December, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodGoodApr 1414 µg/m³Dec 165 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar11Good
Apr15Moderate
May9Good
Jun8Good
Jul13Moderate
Aug9Good
Sep7Good
Oct7Good
Nov7Good
Dec5Good
Location & terrain

Where is Biysk?

Biysk sits at 52.5°N, 85.2°E, 184 m above sea level, in Russia. The nearest listed city is Mayma, 76 km away.

Topography around Biysk

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

Within 3 km, the terrain around Biysk has only modest variations in elevation — a maximum elevation change of 75 m around an average of 188 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 110 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,208 m.

The land around Biysk is covered by trees (47%) and artificial surfaces (36%) within 3 km, trees (35%), cropland (29%) and grassland (25%) within 16 km, and cropland (37%), trees (31%) and grassland (30%) within 80 km.

3 km
75 m
16 km
110 m
80 km
1,208 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Mayma 76 km · Gorno-Altaysk 81 km · Yuzhnyy 129 km · Novoaltaysk 129 km · Zarinsk 132 km · Barnaul 135 km · Novosilikatnyy 136 km · Aleysk 164 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 Biysk (52.5342°, 85.1966°, elevation 184 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).