Weather in Great Falls, Montana
High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →
Great Falls, MT
Sunday, May 17 at 5:55 AM
44
°
Overcast
Feels like
35°
Humidity
62%
Wind
12 mph
Sunrise
5:46 AM
Sunset
8:56 PM
Great Falls, MT
Hour by hour · 24h
55°
11p
54°
12a
52°
1a
52°
2a
50°
3a
50°
4a
49°
5a
49°
6a
48°
7a
51°
8a
54°
9a
57°
10a
60°
11a
61°
12p
63°
1p
64°
2p
65°
3p
65°
4p
64°
5p
63°
6p
61°
7p
60°
8p
56°
9p
54°
10p
Great Falls, MT
7-day forecast
- TodayMay 16Light Drizzle17%59°46°
- SundayMay 17Light Drizzle39%44°37°
- MondayMay 18Overcast11%52°36°
- TuesdayMay 19Light Drizzle—64°37°
- WednesdayMay 20Light Drizzle36%54°43°
- ThursdayMay 21Overcast24%66°40°
- FridayMay 22Light Drizzle32%63°49°
Great Falls, MT
Next 24 hours · Cool now
Great Falls, MT
Anemometer · 24h winds · from true
From · True
NNW
344° · veering 91°
Direction
NNW
344°
Sustained
12
mph
Gust
23
mph
Peak 24h
24
avg 9
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
−24h−18h−12h−6hnow
Great Falls, MT
Air quality
44
AQI
Good
- PM 2.5
- 0.8 μg/m³
- PM 10
- 1.1 μg/m³
- NO₂
- 1.5 μg/m³
- Ozone
- 81.0 μg/m³
- UV Index
- 0.0 Low
Great Falls, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:11 AM
Sunrise
5:46 AM
Daylight
15h 10m
Sunset
8:56 PM
Civil dusk
3:34 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Great Falls, MT
The moon
New Moon
0% illuminated
- Moonrise
- 11:44 AM
- Moonset
- 3:41 AM
- In sign
- ♊︎ Gemini
Great Falls, MT
Microseason · 28 of 72
May 16–20
High country wildflowers peak
bird
Great Falls at a glance
- Today vs. normal: 20°F below the seasonal normal for this latitude
- Last frost: May 31 (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).