easeweather.com
Thunder Bay
AbbotsfordAjaxAuroraBanffBarrieBoisbriandBouchervilleBramptonBrandonBrantfordBrossardBurlingtonBurnabyCalgaryCambridgeCharlottetownChathamChilliwackCoquitlamCornwallDartmouthDeltaDorvalEdmontonFort McMurrayFrederictonGatineauGranbyGrande PrairieGreater SudburyGuelphHalifaxHamiltonKamloopsKanataKelownaKingstonKitchenerLangleyLavalLethbridgeLindsayLondonMarkhamMiltonMissionMississaugaMonctonMont-RoyalMontréalMoose JawNanaimoNepeanNew GlasgowNewmarketNiagara FallsNorfolk CountyNorth BattlefordNorth BayOakvilleOkanaganOrilliaOshawaOttawaPentictonPeterboroughPickeringPointe-ClairePrince AlbertPrince EdwardPrince GeorgeQuébecRed DeerReginaRichmond HillSaguenaySaint JohnSarniaSaskatoonSault Ste. MarieSherbrookeSt. CatharinesSt. John'sSurreySydneyThunder BayTimminsTorontoVancouverVaughanVictoriaWasaga BeachWaterlooWellandWest VancouverWhistlerWhitehorseWindsorWinnipegWoodstockYellowknife More Locations
Canada weather

Weather in Thunder Bay for May 2026

Your guide to Thunder Bay weather in May - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Thunder Bay usually enjoys a light touch of snow in May.
    According to Thunder Bay snow forecast for May 2026, no snow is expected until the end of the month.

    • Temperatures

  • Until now, May 2026 in Thunder Bay is cooler than usual, with temperatures averaging 7.8 °C, this is -2.9 °C below the typical seasonal average.

  • The forecast for the upcoming days in Thunder Bay predicts a temperature of 13 °C, which is slightly above the historical average.

  • In general, the average temperature in Thunder Bay at the beginning of May is 8.3 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 15.7 °C by the end of May.

    • Rain 🌧️

  • The climate of Thunder Bay in May is notably wet, with an average of 15 rainy days, and a total of 110.4 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
14
Dry days
Average rainy days
15
Rainy days
Average snowy days
2
Snow days
Average temperatures
13°/5°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
73 %
Avg humidity

Thunder Bay Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light freezing rain
6°
2
Light freezing rain
7°
3
Patchy rain possible
12°
4
Overcast
8°
5
Overcast
8°
6
Patchy rain possible
10°
7
Moderate or heavy rain shower
7°
8
Overcast
11°
9
Sunny
13°
10
Overcast
12°
11
Heavy rain at times
15°
12
Overcast
16°
13
Overcast
15°
14
Partly cloudy
12°
15
Patchy rain possible
28°
16
Sunny
19°
17
Partly cloudy
10°
18
Moderate rain
15°
19
Moderate rain
9°
20
Partly cloudy
11°
21
Patchy rain possible
4°
22
Patchy rain possible
7°
23
Partly cloudy
11°
24
Patchy rain possible
13°
25
Patchy rain possible
15°
26
Patchy rain possible
14°
27
Patchy rain possible
15°
28
Patchy rain possible
11°
29
Overcast
19°
30
Sunny
19°
31
Patchy rain possible
17°

Temperatures trend during May in Thunder Bay

See the weather trend as well as the moving average line

May weather in Thunder Bay day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
1 May Light freezing rain
Light freezing rain
 6° /0° 10.1 mm 0 cm
2 May Light freezing rain
Light freezing rain
 7° /-1° 7.4 mm 3.4 cm
3 May Patchy rain possible
Patchy rain possible
 12° /1° 0.7 mm 0 cm
4 May Overcast
Overcast
 8° /2° 2.9 mm 0 cm
5 May Overcast
Overcast
 8° /1° 0 mm 0 cm
6 May Patchy rain possible
Patchy rain possible
 10° /2° 0.6 mm 0 cm
7 May Moderate or heavy rain shower
Moderate or heavy rain shower
 7° /2° 1.7 mm 0 cm
8 May Overcast
Overcast
 11° /2° 0 mm 0 cm
9 May Sunny
Sunny
 13° /1° 0 mm 0 cm
10 May Overcast
Overcast
 12° /3° 0.7 mm 0 cm
11 May Heavy rain at times
Heavy rain at times
 15° /3° 0.3 mm 0 cm
12 May Overcast
Overcast
 16° /4° 2.1 mm 0 cm
13 May Overcast
Overcast
 15° /5° 0 mm 0 cm
14 May Partly cloudy
Partly cloudy
 12° /4° 0 mm 0 cm
15 May Patchy rain possible
Patchy rain possible
 28° /8° 1.8 mm 0 cm
16 May Sunny
Sunny
 19° /7° 0 mm 0 cm
17 May Partly cloudy
Partly cloudy
 10° /3° 0.1 mm 0 cm
18 May Moderate rain
Moderate rain
 15° /5° 14.8 mm 0 cm
19 May Moderate rain
Moderate rain
 9° /3° 10.2 mm 0 cm
20 May Partly cloudy
Partly cloudy
 11° /3° 0 mm 0 cm
21 May Patchy rain possible
Patchy rain possible
 4° /3° 3.2 mm 0 cm
22 May Patchy rain possible
Patchy rain possible
 7° /2° 0.2 mm 0 cm
23 May Partly cloudy
Partly cloudy
 11° /0° 0 mm 0 cm
24 May Patchy rain possible
Patchy rain possible
 13° /2° 0.2 mm 0 cm
25 May Patchy rain possible
Patchy rain possible
 15° /9° 1 mm 0 cm
26 May Patchy rain possible
Patchy rain possible
 14° /8° 1.3 mm 0 cm
27 May Patchy rain possible
Patchy rain possible
 15° /9° 0.3 mm 0 cm
28 May Patchy rain possible
Patchy rain possible
 11° /7° 4.4 mm 0 cm
29 May Overcast
Overcast
 19° /8° 0 mm 0 cm
30 May Sunny
Sunny
 19° /9° 0 mm 0 cm
31 May Patchy rain possible
Patchy rain possible
 17° /8° 2 mm 0 cm
Next
Important Notice
Our weather forecast for Thunder Bay in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Thunder Bay forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Thunder Bay in May - FAQ

What are the expected maximum and minimum temperatures in Thunder Bay during May?

During May, expect a variety of temperatures with highs around 13° and lows near 5°, suitable for diverse activities and preferences.

How much rainfall should be expected in Thunder Bay during May?

Significant rainfall exceeding 110.4 mm is expected in Thunder Bay during May, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Thunder Bay in May 2026?

Thunder Bay experiences an average snowfall of 7.27333 cm during May, occurring over 2 days.

What are the typical wind conditions in Thunder Bay during May?

The average wind speed in Thunder Bay during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

Thunder Bay snow forecast May 2026

Track daily snowfall levels and discover Thunder Bay’s snowy potential this May ❄️
On average, Thunder Bay sees 2 snowy days during May, with approximately 7.3 cm of total snowfall.

May rainfall patterns in Thunder Bay

Explore the daily rainfall trends and prepare for Thunder Bays May weather 💧
Typically, Thunder Bay has 15 rainy days in May with a total of 110.4 mm of rainfall.

UV exposure in Thunder Bay during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

Quick links

More Thunder Bay weather pages
You are here
Location coordinates Where is Thunder Bay?

Get accurate weather forecasts for Thunder Bay, located at latitude 48.382 and longitude -89.25. Stay updated with localized weather information tailored for Thunder Bay.

Found a mistake?
We appreciate your attention to details. Tell us here.