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Algonac, MI Weather
Current conditions
Observed at St Clair County International Airport · 45 min ago
Forecast
10-day-
Tonight
Mostly clear. Low around 39, with temperatures rising to around 41 overnight. East wind around 5 mph.
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Wednesday
Patchy fog before 9am. Sunny, with a high near 65. Northeast wind around 3 mph.
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Wednesday Night
Mostly clear, with a low around 44. North northeast wind around 1 mph.
National Weather Service forecast updated 13 hrs ago.
Hourly
Hourly forecast- Now48°
- Wed12 AM46°
- 1 AM44°
- 2 AM43°
- 3 AM42°
- 4 AM41°
- 5 AM40°
- 6 AM40°
- 7 AM40°
- 8 AM40°
- 9 AM44°
- 10 AM50°
- 11 AM55°
- 12 PM58°
- 1 PM61°
- 2 PM62°
- 3 PM63°
- 4 PM63°
- 5 PM63°
- 6 PM61°
- 7 PM58°
- 8 PM53°
- 9 PM51°
- 10 PM50°
10-day forecast
Details- TodayOct 20Sunny39°68°
- WedOct 21Patchy Fog then Sunny44°65°
- ThuOct 22Sunny40°68°
- FriOct 23Sunny40°61°
- SatOct 24Sunny47°62°
- SunOct 25Mostly Sunny48°66°
- MonOct 26Partly Sunny12%44°64°
- TueOct 27Cloudy40°53°
- WedOct 28Cloudy39°52°
- ThuOct 29Sunny46°57°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- TueModerate
- WedModerate
- ThuModerate
Southeast, MI reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyMt. Clemens Ang Base, records since 1896. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Detroit 53 km
- Windsor 53 km
- Warren 42 km
- Sterling Heights 41 km
- Clinton Township 32 km
- Troy 51 km
- Shelby 41 km
- Rochester Hills 51 km
- Southfield 59 km
- Sarnia 41 km
- Saint Clair Shores 32 km
- Royal Oak 52 km
Forecasters' discussion
From the National Weather Service office in DTX, issued 3 hrs ago
Key Messages
- Areas of fog tonight.
- Mild and dry through the week.
Dtw Threshold Probabilities
* Low for cigs/vsby to fall below 200ft and/or 1/2SM late tonight.
Prev Discussion
Issued at 338 PM EDT Tue Oct 20 2026
DISCUSSION...
A blocking pattern will result in surface high pressure and ridging being entrenched for most of this week across the Great Lakes yielding quiet weather conditions.
Surface high pressure slides into Quebec with a light east- southeasterly wind component prevailing into tonight. A similar set up tonight compared to last night with favorable radiational cooling conditions. The lingering lake moisture and a little more notable moisture influx off Lake Erie should bring potential again for fog development tonight. It is difficult to pin down where exactly greater coverage of patchy dense fog may develop, but models suggest greater potential exists for a broader area across southeast Michigan to be impacted by some coverage of fog by tomorrow morning.
No major swings in the thermal profiles for the week with persistence of a warmer airmass that brings temperatures that are a few degrees above climatological norms. Afternoon highs will be mainly in the 60s with overnight lows ranging from the mid-upper 30s to mid 40s.
The northern stream across central Canada will send a front into the region that will weaken and stall out as it moves into the Great Lakes tomorrow while longwave ridge amplification ramps back up ensuring. Lack of any deeper moisture will allow dry and around or slightly above normal warmth into the weekend. High pressure centered over eastern Canada will offer potential for slightly cooler temperatures Friday down to around 60 with the northerly flow becoming established for the day. Temperatures quickly recover as thermal ridge builds back into the Great Lakes for the weekend. The next indication of a pattern change is next week as long range ensemble members point toward a stronger Canadian wave that will break down this blocking pattern and open up the door to our next chance a precipitation and cooler temperatures.
Dtx Watches
MI...None. Lake Huron...None. Lake St Clair...None. Michigan waters of Lake Erie...None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.