Weather in Helena, Montana
High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →
Helena, MT
Sunday, May 17 at 1:31 AM
46
°
Overcast
Feels like
36°
Humidity
40%
Wind
13 mph
Sunrise
5:52 AM
Sunset
8:56 PM
Helena, MT
Hour by hour · 24h
59°
7p
58°
8p
54°
9p
52°
10p
49°
11p
48°
12a
46°
1a
46°
2a
45°
3a
46°
4a
47°
5a
46°
6a
46°
7a
49°
8a
51°
9a
54°
10a
56°
11a
58°
12p
60°
1p
61°
2p
62°
3p
62°
4p
61°
5p
61°
6p
Helena, MT
7-day forecast
- TodayMay 16Light Drizzle36%50°39°
- SundayMay 17Light Snow28%45°35°
- MondayMay 18Light Drizzle—57°34°
- TuesdayMay 19Overcast—66°37°
- WednesdayMay 20Light Snow Shwrs42%59°41°
- ThursdayMay 21Overcast22%66°38°
- FridayMay 22Overcast34%75°47°
Helena, MT
Next 24 hours · Cool now
Helena, MT
Anemometer · 24h winds · from true
From · True
W
277° · backing 15°
Direction
W
277°
Sustained
13
mph
Gust
22
mph
Peak 24h
25
avg 9
Beaufort · 4 · MOD 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
Helena, MT
Air quality
42
AQI
Good
- PM 2.5
- 2.5 μg/m³
- PM 10
- 2.9 μg/m³
- NO₂
- 1.1 μg/m³
- Ozone
- 89.0 μg/m³
- UV Index
- 0.3 Low
Helena, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:18 AM
Sunrise
5:52 AM
Daylight
15h 04m
Sunset
8:56 PM
Civil dusk
3:33 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Helena, MT
The moon
New Moon
0% illuminated
- Moonrise
- 11:51 AM
- Moonset
- 3:40 AM
- In sign
- ♉︎ Taurus
Helena, MT
Microseason · 28 of 72
May 16–20
High country wildflowers peak
bird
Helena at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: May 26 (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).