Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in St. Charles, Idaho

High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →

St. Charles, ID
Sunday, May 17 at 12:22 AM
56
°
Overcast
Feels like
47°
Humidity
33%
Wind
10 mph
Sunrise
6:03 AM
Sunset
8:40 PM
St. Charles, ID
Hour by hour · 24h
62°
6p
60°
7p
56°
8p
52°
9p
49°
10p
48°
11p
47°
12a
45°
1a
44°
2a
44°
3a
37°
4a
32°
5a
34°
6a
33°
7a
40°
8a
46°
9a
51°
10a
56°
11a
62°
12p
63°
1p
64°
2p
64°
3p
65°
4p
65°
5p
L 32°H 65°
St. Charles, ID
7-day forecast
  1. Today
    May 16
    Overcast
    60°34°
  2. Sunday
    May 17
    Drizzle
    17%
    48°33°
  3. Monday
    May 18
    Light Snow Shwrs
    88%
    40°27°
  4. Tuesday
    May 19
    Light Drizzle
    37%
    52°25°
  5. Wednesday
    May 20
    Light Drizzle
    58°37°
  6. Thursday
    May 21
    Overcast
    61°39°
  7. Friday
    May 22
    Overcast
    65°43°
St. Charles, ID
Anemometer · 24h winds · from true
NESW
From · True
WNW
290° · backing 17°
Direction
WNW
290°
Sustained
10
mph
Gust
16
mph
Peak 24h
28
avg 8
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 8 · pk 28 @ 12:00a
−24h−18h−12h−6hnow
Light breeze backing 17° from the wnw.
St. Charles, ID
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
813.4
+1.7 mb in 3h · rising · 24.02 inHg
Now
813.4
mb
3h
+1.7
mb
12h
-1.6
mb
24h
+1.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 808816
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
St. Charles, ID
Air quality
49
AQI
Good
PM 2.5
3.2 μg/m³
PM 10
6.6 μg/m³
NO₂
0.5 μg/m³
Ozone
108.0 μg/m³
UV Index
1.1 Low
St. Charles, ID
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:33 AM
Sunrise
6:03 AM
Daylight
14h 37m
Sunset
8:40 PM
Civil dusk
3:13 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
St. Charles, ID
The moon
New Moon
0% illuminated
Moonrise
12:09 PM
Moonset
3:17 AM
In sign
♉︎ Taurus
St. Charles, ID
Microseason · 28 of 72
May 16–20

High country wildflowers peak

bird
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

St. Charles at a glance

  • Today vs. normal: 14°F below the seasonal normal for this latitude
  • Last frost: April 29 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Cool-season window is open

As of May 17, the cool-season window is open or about to open. Direct-sow peas, lettuce, spinach, radishes, and brassicas now. Hold off on warm-season crops until 1–2 weeks after the last spring frost (around May).

ZIP codes in St. Charles

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.