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Weather in Grimsby for September 2026

Your guide to Grimsby weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Grimsby is slightly cooler than the historical average by 1.8 °C.

  • Expect cooler weather in the next days in Grimsby with the forecast suggesting a temperature of 16.8 °C, lower than the historical average.

  • In general, the average temperature in Grimsby at the beginning of September is 24.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.9 °C by the end of September.

    • Rain 🌧️

  • The climate of Grimsby in September is notably wet, with an average of 11 rainy days, and a total of 59.6 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
19
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/14°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Grimsby Weather September

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

Temperatures trend during September in Grimsby

See the weather trend as well as the moving average line

September weather in Grimsby 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° /14° 0.3 mm 6
2 Sept. Mist
Mist
 24° /14° 40.2 mm 4
3 Sept. Cloudy
Cloudy
 26° /14° 0.8 mm 6
4 Sept. Sunny
Sunny
 25° /16° 3.7 mm 6
5 Sept. Sunny
Sunny
 26° /15° 0 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 25° /17° 5.8 mm 6
7 Sept. Light rain shower
Light rain shower
 21° /14° 1.4 mm 5
8 Sept. Overcast
Overcast
 21° /13° 0 mm 5
9 Sept. Overcast
Overcast
 24° /14° 2 mm 5
10 Sept. Overcast
Overcast
 22° /14° 0 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
 23° /14° 0.1 mm 6
12 Sept. Light rain shower
Light rain shower
 24° /14° 1.6 mm 6
13 Sept. Overcast
Overcast
 24° /13° 0.1 mm 5
14 Sept. Mist
Mist
 22° /12° 0 mm 6
15 Sept. Partly cloudy
Partly cloudy
 24° /13° 0.1 mm 5
16 Sept. Mist
Mist
 23° /14° 0.2 mm 5
17 Sept. Fog
Fog
 22° /15° 0.9 mm 4
18 Sept. Overcast
Overcast
 23° /13° 0 mm 5
19 Sept. Overcast
Overcast
 20° /12° 0 mm 4
20 Sept. Mist
Mist
 21° /11° 0 mm 4
21 Sept. Mist
Mist
 22° /13° 3.2 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 21° /14° 0.5 mm 5
23 Sept. Mist
Mist
 21° /15° 2.4 mm 5
24 Sept. Cloudy
Cloudy
 20° /14° 1.4 mm 5
25 Sept. Partly cloudy
Partly cloudy
 22° /14° 21.6 mm 5
26 Sept. Mist
Mist
 22° /14° 0.4 mm 5
27 Sept. Overcast
Overcast
 19° /14° 0 mm 4.7
28 Sept. Overcast
Overcast
 17° /14° 1.2 mm 3
29 Sept. Overcast
Overcast
 19° /17° 0 mm 3.1
30 Sept. Overcast
Overcast
 20° /17° 0.5 mm 3.5
Next
Important Notice
Our weather forecast for Grimsby 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 Grimsby forecast closer to your planned date for the most up-to-date weather information.
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Grimsby in September - FAQ

What are the expected maximum and minimum temperatures in Grimsby during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Grimsby during September?
Moderate rainfall is anticipated in Grimsby during September, with a total of 59.6 mm spread over approximately 11 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Grimsby during September?
The average wind speed in Grimsby during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Grimsby

Explore the daily rainfall trends and prepare for Grimsbys September weather 💧
Typically, Grimsby has 11 rainy days in September with a total of 59.6 mm of rainfall.

UV exposure in Grimsby during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Grimsby, located at latitude 43.2 and longitude -79.566. Stay updated with localized weather information tailored for Grimsby.

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