ROOTED IN REAL DATA Historical data. Thoughtful planning. No weather guarantees.
Montana · Geographic reference lookup

Your climate reference
near Harlem.

We connect a real Census place to the nearest agricultural NOAA station, then show the distance and the limitations. This is not a locally validated planting calendar.

city · Census 2026
Nearby stations have different climate statuses.

A seasonal station and a mild-climate or limited-data station are not interchangeable. The nearest source has not been replaced to force a calendar.

A reference, not your back garden

0.6 miles NW
from the Census reference point.

The line connects Harlem’s published Census internal point to the weather station. It does not measure terrain, elevation differences or your garden’s microclimate.

0.9 km straight-line distance · Schematic, not a navigation map
N
Census place point Weather station
The nearest reference

Harlem

Seasonal freeze reference · USC00243929

Full station data
Proximity is not a climate-validation score. Place elevation is unavailable in this Census source, so we cannot verify the elevation difference. The nearest station is never silently replaced by a colder one to create a planting calendar.
Spring median · freezing cold seasonsMay 16
Fall median · freezing cold seasonsSep 21
Modeled annual freeze occurrence100%
Uncertainty, made visible

One date never tells
the whole season.

1991–2020 station normals
32°F minimum-temperature threshold

Last spring freeze

Among cold seasons with a freeze: probability of the last occurrence on this date or later.

10%May 31
30%May 22
50%May 16Median reference
70%May 11
90%May 4

The 10% date is later in spring than the median: a more cautious historical reference, still not a guarantee.

First fall freeze

Among cold seasons with a freeze: probability of the first occurrence on this date or earlier.

10%Sep 8
30%Sep 15
50%Sep 21Median reference
70%Sep 25
90%Oct 2

The 10% date is earlier in fall than the median: a more cautious harvest-planning reference.

These percentages are conditional on a cold season containing a 32°F freeze; they are not probabilities across all years. They describe historical climate, not this season’s forecast. The spring and fall probability directions are intentionally different. A garden can be warmer or colder than the reference station.

Check the wider picture

Nearby station comparisons

Differences can signal exposure, elevation, location or data-quality effects.

NOAA referenceDistanceConditional spring medianConditional fall medianStatus
Harlem0.6 miMay 16Sep 21Seasonal freeze reference
Ft Belknap 2 Sw4.8 miNot supportedNot supportedLimited-quality reference
Chinook20.6 miMay 14Sep 23Seasonal freeze reference

Available alternative-station median spread: spring 2 days; fall 2 days. This is a comparison of source references, not a measure of garden uncertainty.

Date probabilities apply among cold seasons with a 32°F freeze, not all years. Check each station’s annual occurrence and quality before comparing.

Know the geography

A traceable place.

Official Census name
Harlem city
Census GEOID
3034375
Published internal point
48.5319, -108.7847
Land area
1.1 km²
Water area
0.0 km²

The published point is inside the Census geography. It is not your address and does not represent every neighborhood or elevation within the place.

Original Census Gazetteer
From climate to gardening

Make the next
decision locally.

A date window alone cannot tell you which crops are suitable today. Check the current forecast, soil warmth, cultivar maturity and regional extension guidance.

Explore crop-specific evidence Current NWS point forecast Find university extension resources

Find your local climate reference

Choose a state, then search its cities, towns and Census-designated places.

Choose a state to search the national Census place inventory.

    Census places are not ZIP codes. A nearby station is a reference, not a garden-level measurement. Distance and data limitations are shown before any calculation.