8.7 /10
Excellent

September is an excellent month in Beloit

Climate Overview

Beloit, United States in September has warm conditions, with highs averaging 24.4°C (76°F).

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 26°C (78°F) at the start to 22°C (71°F) by month's end.

September sees fairly even rainfall, totalling about 95 mm across the month.

Expect around 9.9h of sunshine at the start of September, decreasing to 8.4h by the end.

The warmest days tend to fall around the 18th, averaging 26.3°C (79°F).

Compared to August, this month is about 3°C cooler with 0 fewer rainy days. Temperatures begin dropping heading into October.

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Monthly September Averages

Temperature
24°C / 15°C
Feels Like
25°C / 15°C
Rain
9 days · 95 mm
Sunshine
9.4h / day
Humidity
70% — Humid
Wind
17 km/h
Wind Direction
SSE (168°)
Gusts
36 km/h
Daylight
12.5 h
Cloud Cover
49%
Clear Sky Days
6.9
UV Index
5.2 — High
Dew Point
14°C — Comfortable
Moon Phase
Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 28°C 24°C 20°C 16°C 12°C 8°C 151015202530
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 10 mm 151015202530
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202530
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202530
Wind Speed
Sun Position
Sunrise 06:37
Daylight 12.5h
Sunset 19:08

What to Expect

Daytime temperatures around 24°C (76°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
-1°C / -8°C
Feels Like
-6°C / -13°C
Rain
8days (53 mm) Wet
Sun
5.1h Fair
Humidity
75% Muggy
UV
2.3 Moderate
Snow Days
10days
February
Poor
Temp
2°C / -7°C
Feels Like
-2°C / -12°C
Rain
7days (41 mm) Good
Sun
6.9h Fair
Humidity
70% Muggy
UV
3.4 Moderate
Snow Days
9days
March
Poor
Temp
9°C / -1°C
Feels Like
5°C / -5°C
Rain
9days (84 mm) Wet
Sun
7.7h Good
Humidity
67% Muggy
UV
4.5 Moderate
Snow Days
5days
April
Fair
Temp
14°C / 4°C
Feels Like
12°C / 0°C
Rain
13days (100 mm) Wet
Sun
8.6h Good
Humidity
66% Muggy
UV
5.4 High
Snow Days
3days
May
Good
Temp
21°C / 11°C
Feels Like
20°C / 8°C
Rain
13days (114 mm) Wet
Sun
9.9h Good
Humidity
69% Muggy
UV
6.5 High
June best
Excellent
Temp
27°C / 17°C
Feels Like
28°C / 17°C
Rain
11days (92 mm) Wet
Sun
11.6h Excellent
Humidity
67% Muggy
UV
7.1 Very High
July best
Excellent
Temp
28°C / 19°C
Feels Like
31°C / 20°C
Rain
10days (85 mm) Wet
Sun
12h Excellent
Humidity
71% Muggy
UV
7 High
August best
Excellent
Temp
27°C / 18°C
Feels Like
29°C / 19°C
Rain
9days (85 mm) Wet
Sun
11h Excellent
Humidity
71% Muggy
UV
6.4 High
September best
Excellent
Temp
24°C / 15°C
Feels Like
25°C / 15°C
Rain
9days (95 mm) Wet
Sun
9.4h Good
Humidity
70% Muggy
UV
5.2 High
October best
Good
Temp
17°C / 9°C
Feels Like
15°C / 6°C
Rain
10days (83 mm) Wet
Sun
7.1h Good
Humidity
69% Muggy
UV
3.8 Moderate
Snow Days
1days
November
Poor
Temp
8°C / 1°C
Feels Like
5°C / -3°C
Rain
7days (50 mm) Good
Sun
6.1h Fair
Humidity
70% Muggy
UV
2.4 Moderate
Snow Days
3days
December
Poor
Temp
2°C / -5°C
Feels Like
-2°C / -9°C
Rain
8days (52 mm) Wet
Sun
5.1h Fair
Humidity
73% Muggy
UV
1.9 Low
Snow Days
8days
Month Temp Feels Like Rain Sun Humidity UV Status Details
January -1°C / -8°C -6°C / -13°C 8days (53 mm) Wet 5.1h Fair 75% Muggy 2.3 Moderate Poor View Details
February 2°C / -7°C -2°C / -12°C 7days (41 mm) Good 6.9h Fair 70% Muggy 3.4 Moderate Poor View Details
March 9°C / -1°C 5°C / -5°C 9days (84 mm) Wet 7.7h Good 67% Muggy 4.5 Moderate Poor View Details
April 14°C / 4°C 12°C / 0°C 13days (100 mm) Wet 8.6h Good 66% Muggy 5.4 High Fair View Details
May 21°C / 11°C 20°C / 8°C 13days (114 mm) Wet 9.9h Good 69% Muggy 6.5 High Good View Details
June best 27°C / 17°C 28°C / 17°C 11days (92 mm) Wet 11.6h Excellent 67% Muggy 7.1 Very High Excellent View Details
July best 28°C / 19°C 31°C / 20°C 10days (85 mm) Wet 12h Excellent 71% Muggy 7 High Excellent View Details
August best 27°C / 18°C 29°C / 19°C 9days (85 mm) Wet 11h Excellent 71% Muggy 6.4 High Excellent View Details
September best 24°C / 15°C 25°C / 15°C 9days (95 mm) Wet 9.4h Good 70% Muggy 5.2 High Excellent View Details
October best 17°C / 9°C 15°C / 6°C 10days (83 mm) Wet 7.1h Good 69% Muggy 3.8 Moderate Good View Details
November 8°C / 1°C 5°C / -3°C 7days (50 mm) Good 6.1h Fair 70% Muggy 2.4 Moderate Poor View Details
December 2°C / -5°C -2°C / -9°C 8days (52 mm) Wet 5.1h Fair 73% Muggy 1.9 Low Poor View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaBreathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

September is typically excellent for visiting Beloit, with average highs of 24°C (76°F) and around 9 rainy days. Beloit, United States in September has warm conditions, with highs averaging 24.4°C (76°F).
Beloit typically sees around 9 rainy days in September with 95 mm (3.7 in) of total rainfall. An umbrella should suffice.
Evenings in Beloit during September are mild at 15°C (59°F). A light cardigan is usually enough.
With highs of 24°C (76°F) and lows of 15°C (59°F) in September, we recommend: Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses. Comfortable walking shoes are essential.
Yes, September offers some of the best weather conditions in Beloit with comfortable temperatures and lower chances of rain.
The average UV index in Beloit during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.
Beloit gets approximately 13 hours of daylight per day in September, with around 9 hours of sunshine.
Snow is uncommon in Beloit during September based on 10-year climate averages.

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