
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 21 °C on Saturday, while the low is 8 °C on Monday. There are expected to be 2 sunny days and rain on 2 days this week.
There are currently no weather alerts.
Monday, October 13
- High of 16 °C, low of 8 °C (73% humidity)- Partly cloudy with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 7:28 AM, sunset at 6:37 PM
- Last quarter moon

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Tuesday, October 14
- High of 19 °C, low of 12 °C (59% humidity)
- Fair with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (23 km/h wind)
- Sunrise at 7:29 AM, sunset at 6:36 PM
- Fair with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (23 km/h wind)
- Sunrise at 7:29 AM, sunset at 6:36 PM

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ESOlex // Shutterstock
Wednesday, October 15
- High of 14 °C, low of 11 °C (48% humidity)
- Partly cloudy with a 0% chance of snow
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 7:30 AM, sunset at 6:34 PM
- Partly cloudy with a 0% chance of snow
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 7:30 AM, sunset at 6:34 PM

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afoto6267 // Shutterstock
Thursday, October 16
- High of 13 °C, low of 8 °C (37% humidity)
- Sunny with a 0% chance of snow
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (20 km/h wind)
- Sunrise at 7:31 AM, sunset at 6:32 PM
- Sunny with a 0% chance of snow
- Moderate risk of harm from sun exposure (3 UV index)
- Light breeze (20 km/h wind)
- Sunrise at 7:31 AM, sunset at 6:32 PM

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Zyabich // Shutterstock
Friday, October 17
- High of 15 °C, low of 9 °C (42% humidity)
- Overcast with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light air (10 km/h wind)
- Sunrise at 7:33 AM, sunset at 6:31 PM
- Overcast with a 0% chance of snow
- Moderate risk of harm from sun exposure (4 UV index)
- Light air (10 km/h wind)
- Sunrise at 7:33 AM, sunset at 6:31 PM

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Leonid Ikan // Shutterstock
Saturday, October 18
- High of 21 °C, low of 13 °C (49% humidity)
- Mostly cloudy with a 100% chance of rain (3 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 7:34 AM, sunset at 6:29 PM
- Mostly cloudy with a 100% chance of rain (3 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Light breeze (26 km/h wind)
- Sunrise at 7:34 AM, sunset at 6:29 PM

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Sandra Matic // Shutterstock
Sunday, October 19
- High of 18 °C, low of 11 °C (48% humidity)
- Partly cloudy with a 100% chance of rain (10 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Gentle breeze (33 km/h wind)
- Sunrise at 7:35 AM, sunset at 6:27 PM
- Partly cloudy with a 100% chance of rain (10 mm of rain)
- Moderate risk of harm from sun exposure (4 UV index)
- Gentle breeze (33 km/h wind)
- Sunrise at 7:35 AM, sunset at 6:27 PM