Coteau-du-Lac, Canada

1. Fri6 AM50°4 mph
2. 7 AM49°5 mph
3. 8 AM53°5 mph
4. 9 AM56°5 mph
5. 10 AM59°5 mph
6. 11 AM62°5 mph
7. 12 PM65°6 mph
8. 1 PM68°6 mph
9. 2 PM70°6 mph
10. 3 PM71°6 mph
11. 4 PM71°6 mph
12. 5 PM70°6 mph
13. 6 PM66°4 mph
14. 7 PM61°6 mph
15. 8 PM60°6 mph
16. 9 PM59°6 mph
17. 10 PM58°7 mph
18. 11 PM57°6 mph
19. Sat12 AM56°6 mph
20. 1 AM55°6 mph
21. 2 AM54°5 mph
22. 3 AM54°6 mph
23. 4 AM54°7 mph
24. 5 AM54°7 mph
25. 6 AM54°8 mph
26. 7 AM55°9 mph
27. 8 AM56°9 mph
28. 9 AM58°8 mph
29. 10 AM60°9 mph
30. 11 AM64°10 mph
31. 12 PM66°10 mph
32. 1 PM68°11 mph
33. 2 PM69°11 mph
34. 3 PM69°11 mph
35. 4 PM69°12 mph
36. 5 PM67°11 mph
37. 6 PM65°10 mph
38. 7 PM64°10 mph
39. 8 PM63°10 mph
40. 9 PM62°10 mph
41. 10 PM61°11 mph
42. 11 PM60°12 mph
43. Sun12 AM60°13 mph
44. 1 AM59°13 mph
45. 2 AM58°13 mph
46. 3 AM57°13 mph
47. 4 AM56°13 mph
48. 5 AM56°13 mph

Scroll sideways for more hours. Pick an hour for every number.

1. TodaySep 2571°54°Clear—wind 7 mph
2. SatSep 2669°56°Partly cloudy—wind 12 mph
3. SunSep 2767°57°Partly cloudy—wind 17 mph
4. MonSep 2860°54°Cloudy—wind 15 mph
5. TueSep 2962°56°Cloudy—wind 9 mph
6. WedSep 3071°62°Light rain—0.06 inwind 6 mph
7. ThuOct 171°56°Cloudy—0.04 inwind 12 mph
8. FriOct 269°58°Partly cloudy—wind 9 mph
9. SatOct 365°54°Cloudy—wind 9 mph
10. SunOct 449°49°No forecast—0.24 inwind 13 mph
11. MonOct 5~56°48°Model mean0.21 in
12. TueOct 6~52°43°Model mean0.15 in
13. WedOct 7~51°37°Model mean
14. ThuOct 8~54°43°Model mean0.31 in
15. FriOct 9~53°40°Model mean0.16 in
16. SatOct 10~47°31°Model mean0.04 in

• Feels like48°
• WindENE 4 mph
• Humidity87%
• Dew point46°
• Pressure30.32 inHg
• UV index0 · Lowclear-sky peak 5 today
• Sunrise and sunsetSunrise · Sunset · not yet up
• Moonrise6:13 PMMoonset 5:30 AM
• Moon phaseWaxing gibbous99% lit

Each line is one model’s own forecast at its own grid cell: three kilometers for HRRR, a quarter of a degree for the global models, which can sit a few hundred meters above or below the town. Where they agree the forecast is settled; where they part is where it is not.

NWS gridBlendHRRRGFSGEFS ± spreadECMWFECMWF AI

A ~ marks a high or low read from six-hourly steps, which miss the true extreme by a degree or two.

ECMWF ensemble meteogram

10 daysTemperature plume

No forecast has skill day by day past about two weeks, and this page does not print one. Where the models stop, the calendar takes over: the 1991 to 2020 normal for each date, the record high and low ever set on it, and where the Climate Prediction Center leans warm, cool, wet or dry over the coming weeks, the month and the season. A site that shows a high for a date three months out is showing you this normal with a wobble.

The forecast reaches Sat Oct 10, from MET Norway, then the mean of the global models. Beyond it the lines are the calendar.

Forecast high and lowNormal high and lowRecord high and low

None of these is a measurement. Each is a rating of the forecast ahead, and of what is happening at the point right now, against what the activity or the ailment is known to mind, and each names the figure that decided it. An ailment or a pest is rated as a risk, low to extreme; an activity, a chore or a journey as a condition, poor to ideal.

Each rating says which span it is for: the rest of today’s daylight, tonight, or the next 24 hours.

Tonight has no dark, clear hour without a bright moon in this forecast. Rated poor.

Dark is the sun 18 degrees below the horizon; where it never gets that low, 12 degrees, marked nautical. Clear is sky cover of 20% or less. A bright moon is one above the horizon with a quarter or more of its disc lit. Transparency is estimated from surface humidity (70% and 85% mark fair and poor) and visibility, since the forecast carries no haze or high cloud moisture; seeing is not rated. Dew is the air within 2 °C of its dew point. Excellent is four or more clear moonless hours with good transparency; good is three; fair is one, or two clear hours.

Hours fit for spraying, and the days dry enough for fieldwork and hay, read from this forecast’s wind, gusts, humidity, temperature and rain.

Spraying windows

• Fri 9 AM to Sat 2 AM 17 hours, every hour within the rules
• Sat 5 AM to 11 AM 6 hours, every hour within the rules
• Mon 8 AM to 2 PM 6 hours, every hour within the rules
• Mon 8 PM to Tue 2 AM 6 hours, every hour within the rules
• Tue 8 AM to 2 PM 6 hours, every hour within the rules
• Wed 2 PM to 8 PM 6 hours, every hour within the rules
• Thu 8 PM to Fri 2 AM 6 hours, every hour within the rules
• Fri 2 PM to Sat 2 AM 12 hours, every hour within the rules

Good Marginal No

Field days

Spraying: sustained wind 3 to 10 mph, the range US extension services and most labels give; gusts no more than 15 mph (this page’s limit); delta T (air minus wet-bulb temperature) 2 to 8 °C preferred and 8 to 10 °C marginal, from GRDC guidance, with the wet bulb by Stull’s formula; no hour at a 30% chance of rain or 0.25 mm forecast during the rain-free time. Follow the product label, which overrides all of this. Field days: dry is no daytime hour at a 30% chance and under 1 mm all day, wet is 6 mm (0.25 in) or more; soil moisture is not in the forecast, so ground still wet from earlier rain is not accounted for. Hay drying marks a dry day with humidity down to 50% and a breeze of 5 mph or more.

1. Today71° · NE 4–6 mph

   Clear. High near 21°C. Northeast wind 7 to 10 km/h.

2. Tonight54° · NNE 4–7 mph

   Partly cloudy. Low near 12°C. Northnortheast wind 7 to 12 km/h.

3. Saturday69° · NE 8–12 mph

   Partly cloudy. High near 21°C. Northeast wind 13 to 19 km/h.

4. Saturday Night56° · NE 10–13 mph

   Partly cloudy. Low near 13°C. Northeast wind 16 to 21 km/h.

5. Sunday67° · NE 13–17 mph

   Partly cloudy. High near 19°C. Northeast wind 21 to 28 km/h.

6. Sunday Night57° · NE 10–16 mph

   Cloudy. Low near 14°C. Northeast wind 16 to 25 km/h.

7. Monday60° · NE 10–11 mph

   Cloudy. High near 15°C. Northeast wind 16 to 17 km/h.

8. Monday Night54° · NE 6–9 mph

   Cloudy. Low near 12°C. Northeast wind 9 to 14 km/h.

9. Tuesday62° · NNE 2–4 mph

   Cloudy. High near 17°C. Northnortheast wind 4 to 6 km/h.

10. Tuesday Night56° · WSW 2–5 mph

    Partly cloudy. Low near 13°C. Westsouthwest wind 4 to 8 km/h.

11. Wednesday71° · SSW 5–6 mph

    Light rain. High near 22°C. Southsouthwest wind 8 to 9 km/h. Precipitation around 0.7 mm.

12. Wednesday Night62° · SW 6–9 mph

    Rain. Low near 17°C. Southwest wind 10 to 15 km/h. Precipitation around 1.6 mm.

13. Thursday71° · WSW 9–12 mph

    Cloudy. High near 22°C. Westsouthwest wind 15 to 19 km/h.

14. Thursday Night56° · W 6–7 mph

    Clear. Low near 13°C. West wind 9 to 11 km/h.

15. Friday69° · WSW 7–7 mph

    Partly cloudy. High near 20°C. Westsouthwest wind 11 to 12 km/h.

16. Friday Night58° · W 5–9 mph

    Partly cloudy. Low near 14°C. West wind 8 to 15 km/h.

17. Saturday65° · NE 4–5 mph

    Cloudy. High near 18°C. Northeast wind 6 to 8 km/h.

18. Saturday Night54° · ENE 4–11 mph

    Heavy rain. Low near 12°C. Eastnortheast wind 6 to 17 km/h. Precipitation around 6 mm.

19. Sunday49° · NE 14 mph

    No forecast. High near 9°C. Northeast wind around 22 km/h.

The last spring freeze (32°F) usually comes around May 10 and the first fall freeze around October 2: a growing season of about 144 days.

One fall in ten brings a freeze by September 17; one spring in ten still has one after May 25.

Climate of Coteau-du-Lac: normals, records and every month

The forecast office edits about sixty fields for every cell of its grid. The common ones are above; these are the rest, as the daily extreme, for anyone who needs the mixing height, the fire danger or the swell.

Each forecast day against the same calendar date at the nearest long-record station: the 1991 to 2020 normal, and the record high and low with the year they were set.