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

Weather in Sidney, Montana

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

Sidney, MT
Sunday, May 17 at 5:11 AM
55
°
Overcast
Feels like
47°
Humidity
37%
Wind
8 mph
Sunrise
5:17 AM
Sunset
8:29 PM
Sidney, MT
Hour by hour · 24h
58°
11p
57°
12a
56°
1a
55°
2a
54°
3a
53°
4a
52°
5a
52°
6a
55°
7a
58°
8a
62°
9a
64°
10a
66°
11a
66°
12p
66°
1p
68°
2p
69°
3p
68°
4p
70°
5p
65°
6p
65°
7p
60°
8p
54°
9p
51°
10p
L 51°H 70°
Sidney, MT
7-day forecast
  1. Today
    May 16
    Foggy
    11%
    67°37°
  2. Sunday
    May 17
    Light Drizzle
    23%
    59°46°
  3. Monday
    May 18
    Heavy Drizzle
    12%
    46°41°
  4. Tuesday
    May 19
    Overcast
    13%
    62°34°
  5. Wednesday
    May 20
    Light Drizzle
    12%
    74°46°
  6. Thursday
    May 21
    Drizzle
    12%
    65°49°
  7. Friday
    May 22
    Overcast
    22%
    75°48°
Sidney, MT
Anemometer · 24h winds · from true
NESW
From · True
E
092° · veering 69°
Direction
E
092°
Sustained
8
mph
Gust
31
mph
Peak 24h
31
avg 10
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
avg 10 · pk 31 @ 11:00p
−24h−18h−12h−6hnow
Light breeze veering 69° from the e.
Sidney, MT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
936.5
-1.0 mb in 3h · falling · 27.65 inHg
Now
936.5
mb
3h
-1.0
mb
12h
-5.2
mb
24h
-5.7
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 936944
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Sidney, MT
Air quality
43
AQI
Good
PM 2.5
2.3 μg/m³
PM 10
2.7 μg/m³
NO₂
2.2 μg/m³
Ozone
75.0 μg/m³
UV Index
0.0 Low
Sidney, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:42 AM
Sunrise
5:17 AM
Daylight
15h 12m
Sunset
8:29 PM
Civil dusk
3:06 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Sidney, MT
The moon
New Moon
0% illuminated
Moonrise
11:12 AM
Moonset
3:12 AM
In sign
♊︎ Gemini
Sidney, 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 →

Sidney at a glance

  • Today vs. normal: 9°F below the seasonal normal for this latitude
  • Last frost: June 1 (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).

ZIP codes in Sidney

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.