30-day outlook · Thunder Bay
14-day forecast →Sep 1813°4°First quarter
1920°7°40%
2016°5°45%
2116°1°10%
2216°3°7%
2317°5°7%
2418°9°9%
2515°10°5%
2616°11°Full moon
2715°12°66%
2815°14°78%
2913°9°93%
3012°6°25%
Oct 17°4°46%
2avg14°2°
3avg14°2°Last quarter
4avg14°1°
5avg13°1°
6avg13°1°
7avg13°1°
8avg13°1°
9avg12°0°
10avg12°0°New moon
11avg12°0°
12avg12°0°
13avg11°0°
14avg11°-1°
15avg11°-1°
16avg11°-1°
17avg10°-1°
TodayForecast, days 1–14Avg — typical for the date, not a forecast
Days 1–14 at a glance
Today →| Day | Weather | High | Low | Precip | Source |
|---|---|---|---|---|---|
| Today Sep 18 | Mostly sunny | 13° | 4° | 15% · 0 mm | Forecast |
| Sat Sep 19 | Partly cloudy | 20° | 7° | 40% · 0 mm | Forecast |
| Sun Sep 20 | Sunny | 16° | 5° | 45% · 0.5 mm | Forecast |
| Mon Sep 21 | Partly cloudy | 16° | 1° | 10% · 0 mm | Forecast |
| Tue Sep 22 | Sunny | 16° | 3° | 7% · 0 mm | Forecast |
| Wed Sep 23 | Partly cloudy | 17° | 5° | 7% · 0 mm | Forecast |
| Thu Sep 24 | Partly cloudy | 18° | 9° | 9% · 0 mm | Forecast |
| Fri Sep 25 | Sunny | 15° | 10° | 5% · 0 mm | Outlook |
| Sat Sep 26 | Sunny | 16° | 11° | 11% · 0 mm | Outlook |
| Sun Sep 27 | Mostly cloudy | 15° | 12° | 66% · 3 mm | Outlook |
| Mon Sep 28 | Fog | 15° | 14° | 78% · 2 mm | Outlook |
| Tue Sep 29 | Showers | 13° | 9° | 93% · 13 mm | Outlook |
| Wed Sep 30 | Mostly cloudy | 12° | 6° | 25% · 0 mm | Outlook |
| Thu Oct 1 | Showers | 7° | 4° | 46% · 0.4 mm | Outlook |
Days 15–30 · what is typical
No forecast is reliable beyond two weeks, so these are the normals for Thunder Bay on those dates: how highs and lows usually change, how much rain or snow to expect, daylight and the Moon.
| Dates | Normal high | Normal low | Precip | Daylight | Moon |
|---|---|---|---|---|---|
| Oct 2–10 9 days | 14° → 12° | 2° → 0° | ≈22 mm | 11 h 36 → 11 h 8 | Last quarter Oct 3 · New moon Oct 10 |
| Oct 11–17 7 days | 12° → 10° | 0° → -1° | ≈17 mm | 11 h 4 → 10 h 44 | — |
Climate normals 1981–2010, Flint station · Environment and Climate Change Canada
Days 1–7: Environment and Climate Change Canada (City of Thunder Bay) · days 8–14: WeatherAPI.com · days 15–30: Climate normals 1981–2010, Flint station · Environment and Climate Change Canada · 48.3820°N, 89.2502°W