St. Catharines 7-day weather forecast

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June 8, 2026
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St. Catharines 7-day weather forecast

created the forecast for St. Catharines, Ontario using data from . This week's high is 30 掳C on Sunday, while the low is 16 掳C on Tuesday. There are expected to be 5 sunny days and rain on 5 days this week.

There are currently no weather alerts.

Monday, August 3

- High of 25 掳C, low of 17 掳C (65% humidity)
- Fair with a 100% chance of rain (5 mm of rain)
- Very high risk of harm from sun exposure (7 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 6:09 AM, sunset at 8:36 PM
1 / 6
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Tuesday, August 4

- High of 25 掳C, low of 16 掳C (58% humidity)
- Sunny with a 0% chance of snow
- Very high risk of harm from sun exposure (8 UV index)
- Light air (8 km/h wind)
- Sunrise at 6:10 AM, sunset at 8:35 PM
2 / 6
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Wednesday, August 5

- High of 26 掳C, low of 18 掳C (65% humidity)
- Sunny with a 0% chance of snow
- Very high risk of harm from sun exposure (8 UV index)
- Light breeze (14 km/h wind)
- Sunrise at 6:11 AM, sunset at 8:34 PM
- Last quarter moon
3 / 6
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Thursday, August 6

- High of 29 掳C, low of 21 掳C (59% humidity)
- Sunny with a 100% chance of rain (1 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (28 km/h wind)
- Sunrise at 6:12 AM, sunset at 8:33 PM
4 / 6
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Friday, August 7

- High of 24 掳C, low of 20 掳C (93% humidity)
- Overcast with a 100% chance of rain (9 mm of rain)
- Light air (6 km/h wind)
- Sunrise at 6:13 AM, sunset at 8:31 PM
5 / 6
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Saturday, August 8

- High of 26 掳C, low of 20 掳C (78% humidity)
- Mostly sunny with a 100% chance of rain (2 mm of rain)
- Light breeze (16 km/h wind)
- Sunrise at 6:14 AM, sunset at 8:30 PM
6 / 6
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Sunday, August 9

- High of 30 掳C, low of 20 掳C (66% humidity)
- Mostly cloudy with a 86% chance of rain (1 mm of rain)
- Gentle breeze (37 km/h wind)
- Sunrise at 6:16 AM, sunset at 8:29 PM

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