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

Weather in St. Ignatius, Montana

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

St. Ignatius, MT
Sunday, May 17 at 5:14 AM
41
°
Mostly Clear
Feels like
36°
Humidity
64%
Wind
3 mph
Sunrise
5:58 AM
Sunset
9:07 PM
St. Ignatius, MT
Hour by hour · 24h
50°
11p
50°
12a
48°
1a
50°
15%
2a
49°
21%
3a
47°
11%
4a
47°
5a
45°
6a
45°
7a
50°
8a
51°
9a
51°
10a
53°
11a
54°
12p
56°
1p
57°
2p
58°
3p
58°
4p
58°
5p
57°
6p
56°
7p
54°
8p
52°
9p
51°
10p
L 45°H 58°
St. Ignatius, MT
7-day forecast
  1. Today
    May 16
    Snow
    62%
    47°41°
  2. Sunday
    May 17
    Drizzle
    54%
    51°38°
  3. Monday
    May 18
    Light Drizzle
    —
    59°37°
  4. Tuesday
    May 19
    Light Drizzle
    28%
    61°41°
  5. Wednesday
    May 20
    Drizzle
    36%
    57°44°
  6. Thursday
    May 21
    Overcast
    14%
    67°43°
  7. Friday
    May 22
    Overcast
    32%
    72°48°
St. Ignatius, MT
Next 24 hours · Cool now
42°52°62°12a6a12p6pnow 50°high 58°low 45°PRECIP %
St. Ignatius, MT
Anemometer · 24h winds · from true
NESW
From · True
WSW
255° · veering 120°
Direction
WSW
255°
Sustained
3
mph
Gust
4
mph
Peak 24h
17
avg 4
Beaufort · 1 · LIGHT AIR
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 4 · pk 17 @ 4:00p
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
St. Ignatius, MT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
913.7
+0.2 mb in 3h · falling · 26.98 inHg
Now
913.7
mb
3h
+0.2
mb
12h
+0.6
mb
24h
+2.1
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 911–914
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
St. Ignatius, MT
Air quality
40
AQI
Good
PM 2.5
1.3 μg/m³
PM 10
1.7 μg/m³
NO₂
2.4 μg/m³
Ozone
80.0 μg/m³
UV Index
0.0 Low
St. Ignatius, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:23 AM
Sunrise
5:58 AM
Daylight
15h 09m
Sunset
9:07 PM
Civil dusk
3:44 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
St. Ignatius, MT
The moon
New Moon
0% illuminated
Moonrise
11:55 AM
Moonset
3:53 AM
In sign
♊︎ Gemini
St. Ignatius, MT
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. Ignatius at a glance

  • Today vs. normal: 23°F below the seasonal normal for this latitude
  • Last frost: May 30 (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).

All cities in Montana →

ZIP codes in St. Ignatius

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.