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Weather in Newmarket for September 2025

Your guide to Newmarket weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Newmarket is cooler than usual, with temperatures averaging 21 °C, this is -2.7 °C below the typical seasonal average.

  • Expect cooler weather in the next days in Newmarket with the forecast suggesting a temperature of 22.1 °C, lower than the historical average.

  • In general, the average temperature in Newmarket at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.4 °C by the end of September.

    • Rain 🌧️

  • Newmarket experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 51.3 mm.

    • More

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

Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/12°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Newmarket Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
24°
2
Mist
22°
3
Partly cloudy
27°
4
Partly cloudy
26°
5
Partly cloudy
27°
6
Thundery outbreaks possible
25°
7
Light rain shower
19°
8
Overcast
20°
9
Mist
23°
10
Mist
23°
11
Patchy rain possible
24°
12
Moderate or heavy rain shower
24°
13
Cloudy
22°
14
Cloudy
26°
15
Partly cloudy
23°
16
Sunny
25°
17
Cloudy
29°
18
Sunny
31°
19
Sunny
19°
20
Sunny
19°
21
Sunny
25°
22
Partly cloudy
24°
23
Moderate rain
20°
24
Moderate rain
22°
25
Moderate rain
20°
26
Sunny
13°
27
Sunny
14°
28
Overcast
19°
29
Overcast
20°
30
Mist
21°

Temperatures trend during September in Newmarket

See the weather trend as well as the moving average line

September weather in Newmarket day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 24° /10° 0 mm 5
2 Sept. Mist
Mist
 22° /11° 0.2 mm 5
3 Sept. Partly cloudy
Partly cloudy
 27° /12° 0.5 mm 6
4 Sept. Partly cloudy
Partly cloudy
 26° /14° 14.5 mm 6
5 Sept. Partly cloudy
Partly cloudy
 27° /13° 0 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 25° /15° 4.7 mm 5
7 Sept. Light rain shower
Light rain shower
 19° /11° 4 mm 4
8 Sept. Overcast
Overcast
 20° /7° 0.1 mm 5
9 Sept. Mist
Mist
 23° /8° 1.6 mm 5
10 Sept. Mist
Mist
 23° /10° 0 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
 24° /12° 0.3 mm 6
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /13° 5.7 mm 6
13 Sept. Cloudy
Cloudy
 22° /12° 0 mm 5
14 Sept. Cloudy
Cloudy
 26° /11° 0 mm 1.2
15 Sept. Partly cloudy
Partly cloudy
 23° /14° 0 mm 1.3
16 Sept. Sunny
Sunny
 25° /9° 0 mm 1.3
17 Sept. Cloudy
Cloudy
 29° /15° 0 mm 1.3
18 Sept. Sunny
Sunny
 31° /15° 0 mm 0
19 Sept. Sunny
Sunny
 19° /9° 0 mm 4
20 Sept. Sunny
Sunny
 19° /5° 0 mm 4
21 Sept. Sunny
Sunny
 25° /7° 0 mm 5
22 Sept. Partly cloudy
Partly cloudy
 24° /13° 0 mm 5
23 Sept. Moderate rain
Moderate rain
 20° /16° 5.7 mm 4
24 Sept. Moderate rain
Moderate rain
 22° /16° 5.3 mm 4
25 Sept. Moderate rain
Moderate rain
 20° /12° 8.8 mm 4
26 Sept. Sunny
Sunny
 13° /6° 0 mm 3
27 Sept. Sunny
Sunny
 14° /4° 0 mm 3
28 Sept. Overcast
Overcast
 19° /11° 0 mm 4
29 Sept. Overcast
Overcast
 20° /14° 0 mm 5
30 Sept. Mist
Mist
 21° /12° 0 mm 5
Next
Important Notice
Our weather forecast for Newmarket 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 Newmarket forecast closer to your planned date for the most up-to-date weather information.
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Newmarket in September - FAQ

What are the expected maximum and minimum temperatures in Newmarket 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 Newmarket during September?
Moderate rainfall is anticipated in Newmarket during September, with a total of 51.3 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Newmarket during September?
The average wind speed in Newmarket during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Newmarket

Explore the daily rainfall trends and prepare for Newmarkets September weather 💧

UV exposure in Newmarket 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 Newmarket, located at latitude 44.05 and longitude -79.466. Stay updated with localized weather information tailored for Newmarket.

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