Weather in Roundup, Montana
High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →
Roundup, MT
Sunday, May 17 at 1:33 AM
51
°
Overcast
Feels like
40°
Humidity
58%
Wind
20 mph
Sunrise
5:38 AM
Sunset
8:42 PM
Roundup, MT
Hour by hour · 24h
70°
7p
66°
8p
59°
9p
56°
10p
54°
11p
55°
12a
55°
1a
55°
2a
55°
3a
52°
4a
50°
5a
49°
6a
52°
7a
57°
8a
59°
9a
61°
10a
63°
11a
65°
12p
67°
1p
68°
2p
69°
3p
69°
4p
69°
5p
67°
6p
Roundup, MT
7-day forecast
- TodayMay 16Light Rain50%67°42°
- SundayMay 17Heavy Drizzle49%53°39°
- MondayMay 18Overcast—53°34°
- TuesdayMay 19Overcast—66°36°
- WednesdayMay 20Light Rain28%52°46°
- ThursdayMay 21Light Drizzle14%66°46°
- FridayMay 22Overcast21%70°49°
Roundup, MT
Next 24 hours · Mild now
Roundup, MT
Anemometer · 24h winds · from true
From · True
N
359° · backing 67°
Direction
N
359°
Sustained
20
mph
Gust
28
mph
Peak 24h
31
avg 8
Beaufort · 5 · FRESH 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
Roundup, MT
Air quality
55
AQI
Moderate
- PM 2.5
- 7.0 μg/m³
- PM 10
- 11.9 μg/m³
- NO₂
- 0.5 μg/m³
- Ozone
- 105.0 μg/m³
- UV Index
- 0.2 Low
Roundup, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:05 AM
Sunrise
5:38 AM
Daylight
15h 04m
Sunset
8:42 PM
Civil dusk
3:18 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Roundup, MT
The moon
New Moon
0% illuminated
- Moonrise
- 11:38 AM
- Moonset
- 3:24 AM
- In sign
- ♉︎ Taurus
Roundup, MT
Microseason · 28 of 72
May 16–20
High country wildflowers peak
bird
Roundup at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: May 25 (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).