Weather in Mammoth, Montana
High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →
Mammoth, MT
Sunday, May 17 at 2:58 AM
34
°
Snow
Feels like
25°
Humidity
62%
Wind
8 mph
Sunrise
5:55 AM
Sunset
8:53 PM
Mammoth, MT
Hour by hour · 24h
56°
8p
51°
9p
47°
10p
45°
11p
44°
12a
43°
1a
42°
2a
42°
3a
41°
4a
40°
5a
39°
6a
40°
7a
43°
8a
46°
9a
48°
10a
51°
11a
53°
12p
56°
1p
58°
2p
58°
3p
59°
4p
58°
5p
57°
6p
56°
7p
Mammoth, MT
7-day forecast
- TodayMay 16Snow54%51°30°
- SundayMay 17Heavy Snow32%41°25°
- MondayMay 18Heavy Snow25%48°25°
- TuesdayMay 19Light Drizzle11%57°33°
- WednesdayMay 20Light Snow Shwrs30%47°33°
- ThursdayMay 21Overcast24%58°32°
- FridayMay 22Overcast26%68°42°
Mammoth, MT
Next 24 hours · Cool now
Mammoth, MT
Anemometer · 24h winds · from true
From · True
NW
319° · veering 166°
Direction
NW
319°
Sustained
8
mph
Gust
22
mph
Peak 24h
26
avg 5
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
Mammoth, MT
Air quality
47
AQI
Good
- PM 2.5
- 1.4 μg/m³
- PM 10
- 1.8 μg/m³
- NO₂
- 0.9 μg/m³
- Ozone
- 84.0 μg/m³
- UV Index
- 0.1 Low
Mammoth, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:22 AM
Sunrise
5:55 AM
Daylight
14h 58m
Sunset
8:53 PM
Civil dusk
3:29 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Mammoth, MT
The moon
New Moon
0% illuminated
- Moonrise
- 11:55 AM
- Moonset
- 3:35 AM
- In sign
- ♊︎ Gemini
Mammoth, MT
Microseason · 28 of 72
May 16–20
High country wildflowers peak
bird
Mammoth at a glance
- Today vs. normal: 32°F below the seasonal normal for this latitude
- Last frost: May 20 (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).