Temperature
39 F at 9 PM; 52 F at its warmest, 3 PM, and 36 F at its coolest, 11 PM Wednesday.
- Now
- 39F
- 9 PM
- Highest
- 52F
- 3 PM
- Lowest
- 36F
- 11 PM Wednesday
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Helena Regional Airport, Montana
Medium airport in Lewis and Clark County, Montana38°
57°/30°
Clear·
Feels like 38°·Light air 2 mph SSW
Now. Helena Regional Airport is 38° and clear at 10 PM. The dew point is 31°, so the air feels dry and comfortable. Light air from the south-southwest at 2 mph.
Today and tonight. Tonight falls to about 28° by 7 AM, under a mostly clear sky. A freeze: protect plants and pipes. No rain is expected for the rest of the day.
The week. The warmest day ahead is Saturday, near 70°, and the coolest Wednesday, near 57°. The days ahead look dry. The first freeze could come tomorrow, a low of 28°.
The sky now. The Moon is a waxing crescent, 26% lit, and stays below the horizon until dawn. The next full Moon is Sunday, Oct 25. Look for Saturn, bright in the southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 10 hours 57 minutes long, 3 minutes shorter than yesterday.
0UV Low
31Air quality
82%Humidity
12%Cloud
Now
10:00 PM
38feels38
now, clear
Today
Oct 15
5730
clear day
Fri
Oct 16
6128
mostly clear day
Sat
Oct 17
7033
12mph
Sun
Oct 18
6137
clear day
Mon
Oct 19
6535
mostly clear day
Tue
Oct 20
6138
partly cloudy day
Wed
Oct 21
5737
24%
38°
57°30°
61°28°
70°33°
61°37°
65°35°
61°38°
57°37°
As of 10:00 PM in Helena Regional Airport, Montana.
Air quality
The air at Helena Regional Airport
Index 31, good, led by fine particles. Read at 9 PM from its reporting area, Helena (MT), 2 miles off.
31Good
- Fine particles (PM2.5)31Good3.7 mi
- Ozone-22 ppb16.6 mi
The days ahead
Yesterday measured 34, good.
GoodModerate
- 34YesterdayOct 14
Smoke, the next 45 hours
Little smoke near the ground through Sat 6 PM: the index from smoke stays at 6 or under.
Precipitation
What has fallen at Helena Regional Airport
None in the last 3 days, to Thu 9 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.00in
- Last 3 days
- 0.00in
Visibility
How far you can see at Helena Regional Airport, the next 45 hours
Visibility stays 10 miles or more through Sat 6 PM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- HLN
- ICAO
- KHLN
- IATA
- HLN
- Field elevation
- 3,877 ft
- Serves
- Helena
- Kind
- Medium airport
- Scheduled service
- Yes
- Its own instrument
- HLN
- Wind now
- Calm, read 15 Oct, 21:53
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 05 / 23 | 4,644 ft | 75 ft | Asphalt | 65° / 245° | Calm | Calm |
| 09 / 27 | 9,000 ft | 150 ft | Asphalt | 103° / 283° | Calm | Calm |
| 16 / 34 | 2,989 ft | 75 ft | Asphalt | 180° / 0° | Calm | Calm |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Helena Regional (HLN), Helena Regional Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 31 F, the air 73% saturated; the humidity ran from 38% at 3 PM to 89% at 11 PM Wednesday.
- Dew point now
- 31F
- 9 PM
- Humidity now
- 73%
- Humidity, range
- 38 to 89%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
2 mph from the southeast at 9 PM; at its strongest 10 mph, 5 AM, with a gust of 18 mph at 3 AM.
- Now
- 2mph
- from the southeast
- Strongest
- 10mph
- 5 AM
- Highest gust
- 18mph
- 3 AM
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.67 inHg at 9 PM, rising 0.03 inHg over 3 hours; 0.27 inHg higher than a day before.
- Now
- 30.67inHg
- 9 PM
- 3 hours
- +0.03inHg
- rising
- 24 hours
- +0.27inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
10 miles or more every hour.
- Now
- 10+mi
- Lowest
- 10+mi
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Cloud base
The lowest cloud base came down to 3,800 ft at 4 AM; a base was reported in 4 of the hours.
- Lowest base now
- -
- Lowest in 24 hours
- 3,800ft
- 4 AM
- Hours with a base reported
- 4
How it is measured: Cloud classification, Field Book FB-SKY-001
Precipitation
None measured in the gauge in the last 24 hours.
- Last 24 hours
- 0.00in
- Wettest hour
- -
- Hours with some
- 0
How it is measured: ASOS, Field Book FB-INS-002
Helena Regional: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 5 instruments nearest Helena Regional Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.
measured now3 instruments
At an airfield/0.9 mi away/3,898 ft/21 ft above here
temp, wind, gust, visibility, precip, pressure
At a river or reservoir gauge/0.9 mi away/3,812 ft/65 ft below here
temp, wind, gust, humidity, pressure
Clancy I-15 MP 182.5MTCLN
Beside a road/9.1 mi away/4,203 ft/326 ft above here
temp, pavement temp, wind, visibility, precip
measured daily2 instruments
Helena 2.6 NMT-LC-21
In a volunteer observer's own ground/2.4 mi away/3,762 ft/115 ft below here
precip, snowfall, snow depth
Tizer GardensTIZM8
At a cooperative observer's station/16.3 mi away/4,747 ft/870 ft above here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in Montana
20 places, each with its own forecast and its own instruments.
Big Skysurveyed ski areaBillingscityBozemancityBridger Bowlsurveyed ski areaButtecityCooke CitytownDiscovery Ski Areaski areaFlathead LakefeatureGlacier National ParkfeatureGranite PeakfeatureGreat Divideski areaGreat FallscityHavrecityHelenacityKalispellcityMissoulacityMontana Snowbowlski areaRed Lodge Mountainski areaWest YellowstonetownWhitefish Mountainsurveyed ski area
Near Helena Regional Airport
The nearest places, each with its own forecast and the instruments nearest it.
- Helenacity, 3 mi
- South Hillscommunity, 3 mi
- Helena Valley Southeastcommunity, 3 mi
- East Helenacity, 3 mi
- Helena Valley West Centralcommunity, 4 mi
- Helena West Sidecommunity, 5 mi
- Unionvillecommunity, 6 mi
- Montana Citycommunity, 6 mi
- Helena Valley Northeastcommunity, 7 mi
- Helena Valley Northwestcommunity, 9 mi
- Clancycommunity, 9 mi
- Spokane Creekcommunity, 12 mi
Airports near Helena Regional Airport
- Bert Mooney AirportBTM, 51 mi
- Bowman Field3U3, 53 mi
- Great Falls International AirportGTF, 67 mi
- Bozeman Yellowstone International AirportBZN, 70 mi
- Ruby Valley FieldRVF, 76 mi
- Ennis Big Sky AirportEKS, 94 mi
- Mission FieldLVM, 97 mi
- Dillon AirportDLN, 97 mi