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

Weather in Dayton, Montana

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

Dayton, MT
Sunday, May 17 at 4:08 AM
43
°
Overcast
Feels like
37°
Humidity
63%
Wind
5 mph
Sunrise
5:57 AM
Sunset
9:10 PM
Dayton, MT
Hour by hour · 24h
51°
10p
50°
11p
50°
12a
49°
11%
1a
49°
12%
2a
47°
23%
3a
45°
4a
44°
5a
43°
6a
45°
7a
48°
8a
50°
9a
52°
10a
54°
11a
55°
12p
57°
1p
58°
2p
59°
3p
57°
4p
56°
5p
56°
6p
55°
7p
54°
8p
51°
9p
L 43°H 59°
Dayton, MT
7-day forecast
  1. Today
    May 16
    Drizzle
    53%
    47°41°
  2. Sunday
    May 17
    Snow
    61%
    51°37°
  3. Monday
    May 18
    Drizzle
    56°37°
  4. Tuesday
    May 19
    Drizzle
    45%
    63°39°
  5. Wednesday
    May 20
    Light Drizzle
    32%
    59°44°
  6. Thursday
    May 21
    Overcast
    18%
    69°41°
  7. Friday
    May 22
    Overcast
    35%
    74°48°
Dayton, MT
Anemometer · 24h winds · from true
NESW
From · True
WSW
247° · backing 39°
Direction
WSW
247°
Sustained
5
mph
Gust
7
mph
Peak 24h
29
avg 5
Beaufort · 2 · LIGHT 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 5 · pk 29 @ 2:00p
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Dayton, MT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
914.6
+0.9 mb in 3h · falling · 27.01 inHg
Now
914.6
mb
3h
+0.9
mb
12h
+2.4
mb
24h
+3.1
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 911915
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Dayton, MT
Air quality
41
AQI
Good
PM 2.5
0.8 μg/m³
PM 10
1.0 μg/m³
NO₂
1.2 μg/m³
Ozone
80.0 μg/m³
UV Index
0.0 Low
Dayton, MT
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:21 AM
Sunrise
5:57 AM
Daylight
15h 13m
Sunset
9:10 PM
Civil dusk
3:47 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Dayton, MT
The moon
New Moon
0% illuminated
Moonrise
11:53 AM
Moonset
3:57 AM
In sign
♊︎ Gemini
Dayton, 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 →

Dayton at a glance

  • Today vs. normal: 21°F below the seasonal normal for this latitude
  • Last frost: June 2 (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 Dayton

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.