• Tonight

    May 23

    Lo 6°

    Cloudy, brief showers; cooler

    Asthma Weather
    • Hi
      RealFeel
      24°
    • UV
      4 - Moderate
    • Air Qual.
      Good

  • Fri

    May 24

    14°Lo 5°

    Windy and cooler

    Beneficial weather for asthma
    • Hi
      RealFeel
      12°
    • UV
      6 - High
    • Air Qual.
      Good
    more

  • Sat

    May 25

    17°Lo 7°

    Mostly sunny, windy and cool

    Beneficial weather for asthma
    • Hi
      RealFeel
      15°
    • UV
      7 - High
    • Air Qual.
      Good
    more

  • Sun

    May 26

    18°Lo 7°

    Mostly sunny and breezy

    Beneficial weather for asthma
    • Hi
      RealFeel
      18°
    • UV
      7 - High
    • Cloud
      Cover
      24%
    more

  • Mon

    May 27

    20°Lo 8°

    A full day of sunshine

    Beneficial weather for asthma
    • Hi
      RealFeel
      23°
    • UV
      8 - Very High
    • Cloud
      Cover
      9%
    more
Next Previous
Hi 21° RealFeel® 24° Precipitation 57%

Day

N

E

S

W

  • WSW 13 km/h
  • Gusts: 42 km/h

Plenty of clouds with a shower or thunderstorm around from late morning on; not as warm

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 40%
  • Precipitation: 5 mm
  • Rain: 5 mm
  • Snow: 0 CM
  • Ice: 0 mm
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 6° RealFeel® -1° Precipitation 87%

Night

N

E

S

W

  • N 26 km/h
  • Gusts: 39 km/h

Plenty of clouds, breezy and cooler with a few showers

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 6 mm
  • Rain: 6 mm
  • Snow: 0 CM
  • Ice: 0 mm
  • Hours of Precipitation: 4.5 hrs
  • Hours of Rain: 4.5 hrs

Temperature History - May 23

more Historical Weather Data >
  Today Normal Record 5/23/2012
High 21° 20° N/A 19°
Low 6° 9° N/A 15°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:46 AM with 14:56 of sunlight, then sets at 8:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 7:10 PM with 10:07 of moolight, then sets at 5:17 AM

Top Story

St. Catharines Weather Report

Update on Rainstorm

May 23, 2013; 3:14 PM ET

Heavy rain will continue into Friday across the western Prairies with snow in the higher elevations. more >