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St. Catharines 7-day weather forecast
Stacker created the forecast for St. Catharines, Ontario using data from OpenWeather. This week's high is 25 °C on Wednesday, while the low is 8 °C on Monday. There are expected to be 3 sunny days and rain on 4 days this week.
There are currently no weather alerts.
Monday, June 2
- High of 21 °C, low of 8 °C (51% humidity)- Mostly sunny with a 0% chance of snow
- Very high risk of harm from sun exposure (7 UV index)
- Light breeze (19 km/h wind)
- Sunrise at 5:39 AM, sunset at 8:50 PM
- First quarter moon

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Tuesday, June 3
- High of 22 °C, low of 11 °C (60% humidity)
- Mostly sunny with a 0% chance of snow
- High risk of harm from sun exposure (6 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 5:39 AM, sunset at 8:51 PM
- Mostly sunny with a 0% chance of snow
- High risk of harm from sun exposure (6 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 5:39 AM, sunset at 8:51 PM

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Wednesday, June 4
- High of 25 °C, low of 15 °C (67% humidity)
- Partly cloudy with a 68% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (29 km/h wind)
- Sunrise at 5:38 AM, sunset at 8:52 PM
- Partly cloudy with a 68% chance of rain (0 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (29 km/h wind)
- Sunrise at 5:38 AM, sunset at 8:52 PM

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Thursday, June 5
- High of 17 °C, low of 14 °C (99% humidity)
- Overcast with a 100% chance of rain (14 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (15 km/h wind)
- Sunrise at 5:38 AM, sunset at 8:52 PM
- Overcast with a 100% chance of rain (14 mm of rain)
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (15 km/h wind)
- Sunrise at 5:38 AM, sunset at 8:52 PM

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Cari Rubin Photography // Shutterstock
Friday, June 6
- High of 19 °C, low of 12 °C (59% humidity)
- Overcast with a 100% chance of rain (8 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 5:38 AM, sunset at 8:53 PM
- Overcast with a 100% chance of rain (8 mm of rain)
- Light breeze (14 km/h wind)
- Sunrise at 5:38 AM, sunset at 8:53 PM

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Marian Weyo // Shutterstock
Saturday, June 7
- High of 18 °C, low of 12 °C (98% humidity)
- Overcast with a 100% chance of rain (3 mm of rain)
- Gentle breeze (40 km/h wind)
- Sunrise at 5:37 AM, sunset at 8:54 PM
- Overcast with a 100% chance of rain (3 mm of rain)
- Gentle breeze (40 km/h wind)
- Sunrise at 5:37 AM, sunset at 8:54 PM

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Sunday, June 8
- High of 20 °C, low of 12 °C (66% humidity)
- Sunny with a 0% chance of snow
- Light breeze (14 km/h wind)
- Sunrise at 5:37 AM, sunset at 8:54 PM
- Sunny with a 0% chance of snow
- Light breeze (14 km/h wind)
- Sunrise at 5:37 AM, sunset at 8:54 PM