Saint Paul weather in September

In September, Saint Paul sees average daytime highs of 71°F and overnight lows near 53°F, with 3.4 in of rain across 9.5 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 38% 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 Saint Paul's 3rd-clearest and 6th-windiest month. For the whole year in context, see Saint Paul's year-round climate.

Daytime high
71°
4th warmest
Overnight low
53°
9th coldest
Rainfall
3.4 in
9.5 wet days
Daylight
12 h 18 min
5:57 AM – 6:16 PM
Cloud cover
53%
3rd clearest
Wind
8 mph
6th windiest
Solar energy
4.16 kWh/m²
Travel score
6.7
out of 10

Saint Paul is capital city of the U.S. state of Minnesota and seat of Ramsey County.

Density
2,084/km²
people per km²
Founded
1854

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 Saint Paul 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 82°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
27658
37658
47658
57557
67557
77556
87456
97456
107355
117355
127355
137254
147254
157153
167153
177153
187052
197052
206951
216951
226850
236850
246749
256749
266649
276648
286548
296547
306547

How September really feels in Saint Paul

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.

Saint Paul 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° / 1.066.190.0
Feb28° / 12°1.054.810.10.0
Mar40° / 24°2.07.74.111.60.4
Apr55° / 37°3.210.62.413.23.4
May67° / 49°4.312.10.114.65.9
Jun77° / 60°4.312015.36.4
Jul81° / 64°3.510.5015.16.5
Aug79° / 61°3.810013.96.8
Sep71° / 53°3.49.5012.36.7
Oct57° / 40°2.78.90.810.74.1
Nov40° / 27°1.96.73.89.40.5
Dec28° / 15°1.46.168.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% 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 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
26040
36040
46040
55941
65941
75941
85842
95743
105644
115644
125545
135446
145347
155347
165149
175149
185050
195050
205050
215050
225050
234951
244951
255050
265050
275149
285149
295149
305149

Chance of precipitation in September

Any precipitation

Saint Paul gets around 3.4 in of rain over 9.5 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 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
229
329
429
529
629
729
829
929
1029
1129
1229
1330
1430
1531
1631
1731
1832
1932
2033
2133
2234
2334
2434
2534
2634
2734
2834
2933
3033

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 (%)
1362522152
2392521142
3412420132
4432419122
5452419112
6472318111
7492218101
851221791
952211791
1054211681
1154211681
1256211571
1357211561
1458211461
1559211361
1660211351
1762201251
1864201141
1964201141
2066191041
216819931
227018831
237217731
247417621
257716520
267815520
278014420
288213320
298511310
308610310

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
17light 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
278light breeze
288light breeze
298light breeze
308light 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 5:39 AM to 6:15 AM, and sunset from 6:45 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:396:45
213.05:406:43
313.05:416:41
412.95:436:39
512.95:446:38
612.85:456:36
712.85:466:34
812.75:486:32
912.75:496:30
1012.65:506:28
1112.65:516:26
1212.55:536:24
1312.55:546:22
1412.45:556:20
1512.45:566:18
1612.35:576:16
1712.35:596:14
1812.26:006:12
1912.16:016:10
2012.16:026:08
2112.06:046:06
2212.06:056:04
2311.96:066:02
2411.96:076:00
2511.86:095:58
2611.86:105:56
2711.76:115:54
2811.76:125:52
2911.66:145:50
3011.66:155:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.16 kWh/m².

For context, solar energy here swings from a low near 1.4 kWh/m² to a high of 6.27 kWh/m² in July across the year — September's 4.16 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Saint Paul?

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

6.7
Sightseeing
2nd-best month of the year
4.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Saint Paul for sightseeing.

What to pack for Saint Paul in September

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

In September, Saint Paul sees daytime highs around 71°F and nights near 53°F. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Saint Paul 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 Saint Paul peaks around June 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 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 12UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5Moderate
May7Very high
Jun9Very high
Jul8Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint Paul?

Saint Paul sits at 44.9°N, 93.1°W, 794 ft above sea level, in United States. The nearest listed city is West Saint Paul, 1.9 mi away.

Topography around Saint Paul

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

Within 2 miles, the terrain around Saint Paul has only modest variations in elevation — a maximum elevation change of 348 ft around an average of 823 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 449 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 741 ft.

The land around Saint Paul is covered by artificial surfaces (47%) and trees (40%) within 2 miles, trees (52%) and artificial surfaces (27%) within 10 miles, and cropland (38%) and trees (37%) within 50 miles.

2 miles
348 ft
10 miles
449 ft
50 miles
741 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: West Saint Paul 1.9 mi · South Saint Paul 4.3 mi · Maplewood 5.0 mi · Roseville 5.0 mi · Oakdale 6.2 mi · Longfellow Community 6.2 mi · Woodbury 6.8 mi · Inver Grove Heights 6.8 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 Saint Paul (44.9444°, -93.0933°, elevation 794 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. 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).