ZIP code · Frontier · Michigan · United States
ZIP code 49239 — Frontier
ZIP code 49239 serves Frontier, Michigan.
- Postal code
- 49239Single source Value from one source, not cross-checked.
- City
- Frontier
- County
- Hillsdale
- State
- Michigan
- Country
- United States
- Coordinates
- 41.7825, -84.6047 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 6a (-10 to -5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
- Area code
- 517Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 49239 with another ZIP · ZIPs within 25 miles · distance from 49239
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 15°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 34 | 44 | 58 | 69 | 79 | 83 | 80 | 74 | 61 | 47 | 36 |
| Avg low °F | 15 | 16 | 25 | 35 | 47 | 57 | 60 | 58 | 50 | 40 | 30 | 22 |
| Precip in | 2.8 | 2.3 | 2.4 | 3.7 | 4.6 | 3.9 | 3.6 | 3.9 | 3.6 | 3.4 | 3.0 | 2.4 |
NOAA 1991–2020 climate normals from the nearest station: HILLSDALE (10.7 mi) · NOAA NCEI
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page