São Valério do Sul, Brazil

1. Fri4 PM68°6 mph
2. 5 PM67°7 mph
3. 6 PM65°5 mph
4. 7 PM60°6 mph
5. 8 PM58°6 mph
6. 9 PM57°8 mph
7. 10 PM57°9 mph
8. 11 PM57°10 mph
9. Sat12 AM57°10 mph
10. 1 AM56°9 mph
11. 2 AM56°9 mph
12. 3 AM57°10 mph
13. 4 AM57°11 mph
14. 5 AM58°10 mph
15. 6 AM58°10 mph
16. 7 AM60°11 mph
17. 8 AM65°12 mph
18. 9 AM70°11 mph
19. 10 AM73°14 mph
20. 11 AM76°15 mph
21. 12 PM78°15 mph
22. 1 PM79°14 mph
23. 2 PM80°14 mph
24. 3 PM74°9 mph
25. 4 PM75°11 mph
26. 5 PM74°8 mph
27. 6 PM68°7 mph
28. 7 PM65°10 mph
29. 8 PM65°8 mph
30. 9 PM65°14 mph
31. 10 PM64°7 mph
32. 11 PM64°5 mph
33. Sun12 AM64°6 mph
34. 1 AM64°14 mph
35. 2 AM64°7 mph
36. 3 AM62°9 mph
37. 4 AM62°6 mph
38. 5 AM62°8 mph
39. 6 AM62°8 mph
40. 7 AM62°8 mph
41. 8 AM62°6 mph
42. 9 AM64°5 mph
43. 10 AM67°4 mph
44. 11 AM69°4 mph
45. 12 PM72°4 mph
46. 1 PM74°3 mph
47. 2 PM75°4 mph
48. 3 PM76°6 mph

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

1. TodayOct 268°56°Clear—wind 10 mph
2. SatOct 380°62°Light rain—1.71 inwind 15 mph
3. SunOct 476°60°Fog—0.26 inwind 14 mph
4. MonOct 564°53°Heavy rain—0.44 inwind 14 mph
5. TueOct 678°64°Mostly clear—0.03 inwind 12 mph
6. WedOct 771°68°Heavy rain—4.80 inwind 17 mph
7. ThuOct 874°68°Heavy rain—1.67 inwind 12 mph
8. FriOct 975°71°Heavy rain—1.76 inwind 13 mph
9. SatOct 1071°61°Heavy rain—1.80 inwind 13 mph
10. SunOct 1170°61°Light rain showers—0.10 inwind 12 mph
11. MonOct 12~72°59°Model mean0.28 in
12. TueOct 13~76°62°Model mean1.17 in
13. WedOct 14~73°65°Model mean0.99 in
14. ThuOct 15~76°63°Model mean0.20 in
15. FriOct 16~75°62°Model mean0.04 in
16. SatOct 17~75°58°Model mean

• Feels like68°
• WindESE 6 mph
• Humidity49%
• Dew point48°
• Pressure29.93 inHg
• UV index3 · Moderateclear-sky peak 3 today
• Sunrise and sunsetSunrise · Sunset
• Moonrise12:13 AMMoonset 10:27 AM
• Moon phaseWaning gibbous64% 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 gridGFSGEFS ± 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

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: 3 dark, clear hours without a bright moon, from 8:00 PM. Rated good.

The last night runs past the end of the forecast and is rated on the hours it covers.

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 in the table 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 and transparency by hour, where shown, are Environment and Climate Change Canada’s astronomy forecast (regional model; seeing from cloud, wind shear, turbulence near the ground and the surface temperature trend; transparency from the moisture through the whole air column), under the Open Government Licence - Canada. 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.

Golden hour is the sun between 6 degrees above the horizon and 4 degrees below it; blue hour is the sun between 4 and 6 degrees below. These are the definitions timeanddate.com and PhotoPills use. Directions are degrees clockwise from true north, where the sun’s upper edge and the moon’s center cross a flat horizon; hills and buildings change both. None means the sun does not reach that height on the day; all day means it stays inside the band.

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 4 PM to Sat 3 AM 11 hours, every hour within the rules
• Sun 10 AM to 10 PM 12 hours, every hour within the rules
• Tue 9 AM to 5 PM 8 hours, every hour within the rules
• Sun 9 PM to 11 PM 2 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.

The best-rated day this week is Thursday, rated good.

Periods in bold fall within an hour of sunrise or sunset. The weather’s side is the fishing index · Solunar tables for São Valério do Sul, by month

Major periods are two hours centered on the moon’s passage overhead and underfoot; minor periods are one hour centered on moonrise and moonset: the conventional durations of John Alden Knight’s solunar tables (1936). The rating is this site’s: one point to start, two more within a day and a half of a new or full moon (one more within three and a half days), and one more when a period falls within an hour of sunrise or sunset. The theory has mixed support in fisheries research; the times are exact astronomy.

1. This Afternoon68° · ESE 6–7 mph

   Clear. High near 20°C. Eastsoutheast wind 10 to 11 km/h.

2. Tonight56° · E 5–11 mph

   Partly cloudy. Low near 13°C. East wind 8 to 17 km/h.

3. Saturday80° · NNE 8–16 mph

   Light rain. High near 27°C. Northnortheast wind 13 to 25 km/h. Precipitation around 1.6 mm.

4. Saturday Night62° · NW 5–14 mph

   Heavy rain. Low near 17°C. Northwest wind 8 to 22 km/h. Precipitation around 48 mm.

5. Sunday76° · S 3–8 mph

   Fog. High near 24°C. South wind 5 to 13 km/h.

6. Sunday Night60° · SE 6–14 mph

   Partly cloudy. Low near 15°C. Southeast wind 9 to 22 km/h.

7. Monday64° · SE 11–14 mph

   Heavy rain. High near 18°C. Southeast wind 17 to 23 km/h. Precipitation around 11 mm.

8. Monday Night53° · SE 9–12 mph

   Cloudy. Low near 12°C. Southeast wind 14 to 19 km/h.

9. Tuesday78° · E 3–4 mph

   Mostly clear. High near 26°C. East wind 5 to 6 km/h.

10. Tuesday Night64° · E 7–7 mph

    Heavy rain. Low near 18°C. East wind 11 to 12 km/h. Precipitation around 8 mm.

11. Wednesday71° · NNE 8–17 mph

    Heavy rain. High near 21°C. Northnortheast wind 13 to 27 km/h. Precipitation around 100 mm.

12. Wednesday Night68° · NNE 6–11 mph

    Heavy rain. Low near 20°C. Northnortheast wind 9 to 17 km/h. Precipitation around 32 mm.

13. Thursday74° · NNE 11–12 mph

    Heavy rain. High near 23°C. Northnortheast wind 18 to 20 km/h. Precipitation around 23 mm.

14. Thursday Night68° · N 6 mph

    Heavy rain. Low near 20°C. North wind around 10 km/h. Precipitation around 17 mm.

15. Friday75° · N 6–8 mph

    Heavy rain. High near 24°C. North wind 10 to 13 km/h. Precipitation around 28 mm.

16. Friday Night71° · N 7–13 mph

    Heavy rain. Low near 22°C. North wind 11 to 21 km/h. Precipitation around 11 mm.

17. Saturday71° · NW 6–11 mph

    Heavy rain. High near 22°C. Northwest wind 10 to 18 km/h. Precipitation around 36 mm.

18. Saturday Night61° · WSW 9 mph

    Rain. Low near 16°C. Westsouthwest wind around 15 km/h. Precipitation around 3 mm.

19. Sunday70° · SW 12–12 mph

    Light rain showers. High near 21°C. Southwest wind 19 to 20 km/h. Precipitation around 0.5 mm.

20. Sunday Night61° · S 7 mph

    No forecast. Low near 16°C. South wind around 12 km/h.

Climate of São Valério do Sul: 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.