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

Your climate reference
near Vienna.

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.

town · Census 2026
Distant reference: extra caution is needed.

The nearest agricultural station is 27.0 km away. Its source facts remain visible for transparency, but should not be read as planting dates or a garden-climate estimate for Vienna.

A reference, not your back garden

16.8 miles NW
from the Census reference point.

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

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

Clark

Seasonal freeze reference · USC00391739

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 5
Fall median · freezing cold seasonsOct 5
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 18
30%May 10
50%May 5Median reference
70%Apr 30
90%Apr 22

The 10% date is later in spring than the median: a more cautious historical reference, still not a guarantee.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 24
30%Sep 30
50%Oct 5Median reference
70%Oct 11
90%Oct 19

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
Clark16.8 miMay 5Oct 5Seasonal freeze reference
Clark No216.9 miNot supportedNot supportedLimited-quality reference
Watertown 2 S22.1 miNot supportedNot supportedLimited-quality reference

Available alternative-station median spread: spring not comparable; fall not comparable. 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
Vienna town
Census GEOID
4667220
Published internal point
44.7032, -97.5000
Land area
2.2 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.