• Tonight

    May 21

    Lo 13°

    A couple of evening t-storms

    Skiing Weather
    • Rain
      1 mm
    • Precip
      50%
    • Hours of Precip
      0.5
    more

  • Wed

    May 22

    23°Lo 16°

    Strong t-storms, mainly later

    Poor for skiing
    • Rain
      15 mm
    • Precip
      67%
    • Hours of Precip
      3
    more

  • Thu

    May 23

    20°Lo 7°

    A couple of thunderstorms

    Poor for skiing
    • Rain
      5 mm
    • Precip
      60%
    • Hours of Precip
      3

  • Fri

    May 24

    14°Lo 6°

    Cooler with clouds and sun

    Poor for skiing
    • Rain
      0 mm
    • Precip
      14%
    • Hours of Precip
      0
    more

  • Sat

    May 25

    18°Lo 6°

    Mostly sunny and warmer

    Poor for skiing
    • Rain
      0 mm
    • Precip
      0%
    • Hours of Precip
      0
    more
Next Previous
Hi 20° RealFeel® 19° Precipitation 60%

Day

N

E

S

W

  • NW 16 km/h
  • Gusts: 32 km/h

Mostly cloudy with a couple of showers and a thunderstorm

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 40%
  • Precipitation: 5 mm
  • Rain: 5 mm
  • Snow: 0 CM
  • Ice: 0 mm
  • Hours of Precipitation: 3 hrs
  • Hours of Rain: 3 hrs
Lo 7° RealFeel® 1° Precipitation 61%

Night

N

E

S

W

  • N 21 km/h
  • Gusts: 34 km/h

Breezy and cooler with rain and drizzle

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 3 mm
  • Rain: 3 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 20° 20° N/A 19°
Low 7° 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

Severe Thunderstorm Threat Continues Wednesday

May 21, 2013; 3:42 PM ET

Potential for strong thunderstorms again Wednesday. more >