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Weather in St. Thomas for September 2027

Your guide to St. Thomas weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in St. Thomas at the beginning of September is 25 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °C by the end of September.

    • Rain 🌧️

  • With an average of 5 rainy days, St. Thomas experiences minimal rainfall in September.

    • More

  • Is September a good time to visit St. Thomas? check out the best time to travel to St. Thomas page.

  • ✨ Is September a good time to visit St. Thomas? – Ask the AI Weatherman

Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/12°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
73 %
Avg humidity

St. Thomas Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
26°
2
Moderate rain
25°
3
Moderate rain
28°
4
Light rain
27°
5
Sunny
27°
6
Light rain
23°
7
Light rain shower
20°
8
Overcast
21°
9
Light rain
25°
10
Overcast
24°
11
Overcast
25°
12
Light rain
25°
13
Overcast
24°
14
Mist
24°
15
Partly cloudy
26°
16
Mist
26°
17
Patchy light drizzle
23°
18
Fog
24°
19
Fog
21°
20
Overcast
23°
21
Light rain
21°
22
Moderate rain
23°
23
Moderate rain
21°
24
Patchy rain possible
21°
25
Light rain
22°
26
Overcast
22°
27
Overcast
22°
28
Overcast
20°
29
Patchy rain possible
23°
30
Mist
23°

Temperatures trend during September in St. Thomas

See the weather trend as well as the moving average line

September weather in St. Thomas day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 26° /13° 0.2 mm 6
2 Sept. Moderate rain
Moderate rain
 25° /13° 17.2 mm 5
3 Sept. Moderate rain
Moderate rain
 28° /13° 23.1 mm 5
4 Sept. Light rain
Light rain
 27° /14° 6.5 mm 6
5 Sept. Sunny
Sunny
 27° /14° 0 mm 7
6 Sept. Light rain
Light rain
 23° /13° 4.5 mm 6
7 Sept. Light rain shower
Light rain shower
 20° /11° 2.3 mm 5
8 Sept. Overcast
Overcast
 21° /10° 0 mm 4
9 Sept. Light rain
Light rain
 25° /12° 2.7 mm 4
10 Sept. Overcast
Overcast
 24° /13° 0.1 mm 6
11 Sept. Overcast
Overcast
 25° /12° 0.1 mm 6
12 Sept. Light rain
Light rain
 25° /12° 3.9 mm 6
13 Sept. Overcast
Overcast
 24° /13° 0.1 mm 5
14 Sept. Mist
Mist
 24° /10° 0 mm 6
15 Sept. Partly cloudy
Partly cloudy
 26° /12° 0.9 mm 5
16 Sept. Mist
Mist
 26° /13° 0.6 mm 5
17 Sept. Patchy light drizzle
Patchy light drizzle
 23° /14° 0.6 mm 4
18 Sept. Fog
Fog
 24° /11° 0 mm 5
19 Sept. Fog
Fog
 21° /11° 0.6 mm 4
20 Sept. Overcast
Overcast
 23° /10° 0 mm 4
21 Sept. Light rain
Light rain
 21° /12° 3.5 mm 4
22 Sept. Moderate rain
Moderate rain
 23° /13° 13.6 mm 5.8
23 Sept. Moderate rain
Moderate rain
 21° /13° 18.8 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 21° /13° 2.1 mm 5
25 Sept. Light rain
Light rain
 22° /12° 2.7 mm 5
26 Sept. Overcast
Overcast
 22° /12° 0 mm 4
27 Sept. Overcast
Overcast
 22° /11° 0 mm 5
28 Sept. Overcast
Overcast
 20° /12° 0.8 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 23° /12° 0 mm 5
30 Sept. Mist
Mist
 23° /13° 0.5 mm 5
Next
Important Notice
Our weather forecast for St. Thomas in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. Thomas forecast closer to your planned date for the most up-to-date weather information.
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St. Thomas in September - FAQ

What are the expected maximum and minimum temperatures in St. Thomas during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in St. Thomas during September?
Significant rainfall exceeding 105.2 mm is expected in St. Thomas during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in St. Thomas during September?
The average wind speed in St. Thomas during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in St. Thomas

Explore the daily rainfall trends and prepare for St. Thomass September weather 💧
Typically, St. Thomas has 5 rainy days in September with a total of 105.2 mm of rainfall.

UV exposure in St. Thomas during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is St. Thomas?

Get accurate weather forecasts for St. Thomas, located at latitude 42.774 and longitude -81.18. Stay updated with localized weather information tailored for St. Thomas.

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