St. Catharines 7-day weather forecast

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July 14, 2025
ESOlex // Shutterstock

St. Catharines 7-day weather forecast

Stacker created the forecast for St. Catharines, Ontario using data from OpenWeather. This week's high is 30 °C on Monday, while the low is 19 °C on Saturday. There are expected to be 3 sunny days and rain on 4 days this week.

Environment Canada has issued a heat until Monday at 06:54 PM.

Monday, July 14

- High of 30 °C, low of 22 °C (68% humidity)
- Overcast with a 64% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Light breeze (23 km/h wind)
- Sunrise at 5:50 AM, sunset at 8:55 PM
1 / 6
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Tuesday, July 15

- High of 28 °C, low of 20 °C (51% humidity)
- Sunny with a 0% chance of snow
- Very high risk of harm from sun exposure (8 UV index)
- Light breeze (16 km/h wind)
- Sunrise at 5:50 AM, sunset at 8:54 PM
2 / 6
Nazarova Mariia // Shutterstock

Wednesday, July 16

- High of 30 °C, low of 21 °C (51% humidity)
- Fair with a 0% chance of snow
- Very high risk of harm from sun exposure (8 UV index)
- Light breeze (25 km/h wind)
- Sunrise at 5:51 AM, sunset at 8:53 PM
3 / 6
Canva

Thursday, July 17

- High of 29 °C, low of 22 °C (68% humidity)
- Partly cloudy with a 100% chance of rain (8 mm of rain)
- High risk of harm from sun exposure (7 UV index)
- Gentle breeze (29 km/h wind)
- Sunrise at 5:52 AM, sunset at 8:53 PM
- Last quarter moon
4 / 6
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Friday, July 18

- High of 26 °C, low of 20 °C (65% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- Light breeze (19 km/h wind)
- Sunrise at 5:53 AM, sunset at 8:52 PM
5 / 6
Leonid Ikan // Shutterstock

Saturday, July 19

- High of 27 °C, low of 19 °C (46% humidity)
- Sunny with a 0% chance of snow
- Light breeze (19 km/h wind)
- Sunrise at 5:54 AM, sunset at 8:51 PM
6 / 6
Alex Stemmer // Shutterstock

Sunday, July 20

- High of 25 °C, low of 20 °C (64% humidity)
- Overcast with a 100% chance of rain (1 mm of rain)
- Light breeze (20 km/h wind)
- Sunrise at 5:55 AM, sunset at 8:50 PM

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