Grimsby
September
Weather in Grimsby for September 2025
Your guide to Grimsby weather in September - trends and predictions
In general, the average temperature in Grimsby at the beginning of September is 21.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.
Expect significant rainfall in Grimsby during September, with an average of 16 rainy days.
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14
Dry days
16
Rainy days
0
Snow days
20°/13°
Temperatures
25 km/h
Avg max wind
74 %
Avg humidity
Grimsby in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  22° | 3  23° | 4  21° | 5 19° | 6  23° | 7  21° |
| 8 24° | 9 22° | 10 21° | 11 18° | 12 14° | 13 16° | 14 18° |
| 15 21° | 16 17° | 17  17° | 18 18° | 19 18° | 20 18° | 21 18° |
| 22 17° | 23 16° | 24 17° | 25 17° | 26 18° | 27 16° | 28 16° |
| 29 16° | 30 14° |
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Temperatures trend during September in Grimsby
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 19° /13° | 2.7 mm | 4 | |
| 2 Sept. | Cloudy | 22° /14° | 3 mm | 5 | |
| 3 Sept. | Overcast | 23° /13° | 0.2 mm | 5 | |
| 4 Sept. | Sunny | 21° /12° | 0.1 mm | 5 | |
| 5 Sept. | Overcast | 19° /14° | 0.2 mm | 5 | |
| 6 Sept. | Mist | 23° /14° | 0 mm | 6 | |
| 7 Sept. | Partly cloudy | 21° /15° | 0 mm | 5 | |
| 8 Sept. | Partly cloudy | 24° /14° | 0.5 mm | 6 | |
| 9 Sept. | Sunny | 22° /14° | 0.4 mm | 6 | |
| 10 Sept. | Patchy rain possible | 21° /13° | 2.3 mm | 5 | |
| 11 Sept. | Light rain shower | 18° /11° | 2 mm | 4 | |
| 12 Sept. | Overcast | 14° /8° | 4.2 mm | 4 | |
| 13 Sept. | Overcast | 16° /8° | 0 mm | 4 | |
| 14 Sept. | Overcast | 18° /10° | 0 mm | 4 | |
| 15 Sept. | Overcast | 21° /11° | 0.7 mm | 5 | |
| 16 Sept. | Cloudy | 17° /11° | 0 mm | 5 | |
| 17 Sept. | Light drizzle | 17° /12° | 1.1 mm | 5 | |
| 18 Sept. | Light rain shower | 18° /11° | 2.8 mm | 5 | |
| 19 Sept. | Light drizzle | 18° /12° | 0.7 mm | 5 | |
| 20 Sept. | Light rain | 18° /13° | 2.9 mm | 4 | |
| 21 Sept. | Patchy rain possible | 18° /11° | 0.1 mm | 5 | |
| 22 Sept. | Light rain shower | 17° /11° | 0.3 mm | 4 | |
| 23 Sept. | Patchy rain possible | 16° /11° | 14.5 mm | 4 | |
| 24 Sept. | Patchy rain possible | 17° /10° | 0.9 mm | 4 | |
| 25 Sept. | Overcast | 17° /11° | 3 mm | 4 | |
| 26 Sept. | Patchy rain possible | 18° /11° | 4.9 mm | 4 | |
| 27 Sept. | Patchy rain possible | 16° /8° | 1.3 mm | 4 | |
| 28 Sept. | Overcast | 16° /8° | 0.5 mm | 4 | |
| 29 Sept. | Partly cloudy | 16° /9° | 0.8 mm | 4 | |
| 30 Sept. | Light drizzle | 14° /9° | 9.3 mm | 4 | |
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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.
Grimsby in September - FAQ
What are the expected maximum and minimum temperatures in Grimsby during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Grimsby during September?
In September, Grimsby can expect light to moderate rainfall, totaling 37.2 mm across approximately 16 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Grimsby during September?
The average wind speed in Grimsby during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.
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