Chaska weather in September

In September, Chaska sees average daytime highs of 71°F and overnight lows near 53°F, with 3.2 in of rain across 9.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 66°F by the end. The sky is clear or mostly clear about 41% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Chaska's 2nd-clearest and 6th-windiest month. For the whole year in context, see Chaska's year-round climate.

Daytime high
71°
4th warmest
Overnight low
53°
9th coldest
Rainfall
3.2 in
9.3 wet days
Daylight
12 h 18 min
6:00 AM – 6:18 PM
Cloud cover
51%
2nd clearest
Wind
8 mph
6th windiest
Solar energy
4.21 kWh/m²
Travel score
6.8
out of 10

Chaska is city in Minnesota, United States.

Density
548/km²
people per km²
Founded
1891

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 76°F in the first days to 66°F by the end.

A typical September day in Chaska reaches about 71°F in the afternoon and slips back to 53°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 83°F. Set against its neighbours, September runs about 8°F cooler than August and about 14°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17759
27758
37658
47658
57657
67557
77557
87456
97456
107455
117355
127355
137354
147254
157253
167153
177153
187052
197052
206951
216951
226950
236850
246849
256749
266749
276648
286648
296547
306547

How September really feels in Chaska

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
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.

Chaska weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan23° / 1.05.76.190.0
Feb28° / 12°1.05.34.910.10.0
Mar41° / 24°2.17.94.311.60.5
Apr55° / 37°3.210.82.213.23.5
May68° / 49°4.4120.114.65.9
Jun77° / 60°4.412.2015.36.4
Jul81° / 64°3.610.30156.5
Aug79° / 61°4.09.7013.96.9
Sep71° / 53°3.29.3012.36.8
Oct57° / 40°2.58.40.510.74.3
Nov41° / 27°1.96.83.59.40.5
Dec28° / 14°1.46.368.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26238
36238
46139
56139
66139
76040
86040
95941
105842
115743
125644
135545
145545
155446
165347
175347
185248
195248
205248
215347
225347
235248
245347
255347
265248
275248
285248
295347
305347

Chance of precipitation in September

Any precipitation

Chaska gets around 3.2 in of rain over 9.3 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 31% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
428
529
629
729
829
929
1030
1130
1230
1331
1431
1532
1632
1732
1833
1933
2033
2133
2233
2333
2433
2533
2632
2732
2832
2931
3031

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1362521153
2382520143
3402420132
4422419122
5442319112
6462319112
7482218102
850221891
952211881
1053211781
1154211771
1255211671
1356211661
1458201561
1560201451
1661201351
1761201351
1863191251
1965191141
2067181041
216818941
227117831
237316731
247416631
257715620
267914520
278113420
288212420
298411320
308510320

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
279light breeze
289light breeze
299light breeze
309light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over September. Sunrise moves from 5:41 AM to 6:17 AM, and sunset from 6:47 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:416:47
213.05:426:45
313.05:446:43
412.95:456:41
512.95:466:39
612.85:476:37
712.85:496:36
812.75:506:34
912.75:516:32
1012.65:526:30
1112.65:536:28
1212.55:556:26
1312.55:566:24
1412.45:576:22
1512.45:586:20
1612.36:006:18
1712.36:016:16
1812.26:026:14
1912.16:036:12
2012.16:046:10
2112.06:066:08
2212.06:076:06
2311.96:086:04
2411.96:096:02
2511.86:116:00
2611.86:125:58
2711.76:135:56
2811.76:145:54
2911.66:165:52
3011.66:175:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.21 kWh/m².

For context, solar energy here swings from a low near 1.43 kWh/m² to a high of 6.31 kWh/m² in July across the year — September's 4.21 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.6Bright
94.5Bright
104.5Bright
114.4Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Chaska

In seasonPeak

In September, Chaska sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Chaska sits in the Atlantic hurricane belt; the season peaks August–October.

Chaska's rainy season runs March–October, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Chaska?

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

6.8
Sightseeing
2nd-best month of the year
4.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Chaska for sightseeing.

What to pack for Chaska in September

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

In September, Chaska sees daytime highs around 71°F and nights near 53°F. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Chaska in September

LowModerateHighVery highExtreme

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 Chaska peaks around June 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 13 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 17UV 8Jan 13UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7Very high
Jun9Very high
Jul7Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Chaska?

Chaska sits at 44.8°N, 93.6°W, 732 ft above sea level, in United States. The nearest listed city is Shakopee, 3.7 mi away.

Topography around Chaska

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Chaska.

Within 2 miles, the terrain around Chaska has only modest variations in elevation — a maximum elevation change of 305 ft around an average of 810 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 430 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 669 ft.

The land around Chaska is covered by trees (46%) and grassland (21%) within 2 miles, trees (37%), cropland (25%) and grassland (22%) within 10 miles, and cropland (48%) and trees (27%) within 50 miles.

2 miles
305 ft
10 miles
430 ft
50 miles
669 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Shakopee 3.7 mi · Chanhassen 6.2 mi · Eden Prairie 8.1 mi · Minnetonka 9.9 mi · Prior Lake 11 mi · Hopkins 12 mi · Savage 13 mi · Minnetonka Mills 13 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 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 Chaska (44.7894°, -93.6022°, elevation 732 ft), 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).