RECENT COLD GUIDE
Did it freeze last night?
Check nearby sampled temperatures for both dates that the night crossed, then compare the station record with what you find at the property.
Start with a U.S. ZIP code or city and state.
Review the whole overnight period
“Last night” rarely fits inside one calendar date. Evening observations belong to yesterday, while the hours after midnight belong to today. YesterSky’s public picker ends at yesterday, so use yesterday’s result for the evening and early overnight context; for conditions after midnight today, use a current official observation source or an on-site sensor.
- Confirm the place, reporting station and straight-line distance.
- Check the lowest sampled temperature and the observation timeline.
- Look for long gaps, especially near the coldest pre-dawn hours.
- Do not treat the displayed low as an official daily minimum.
- Inspect exposed pipes, plants and low-lying areas when the exact site matters.
A station reading cannot prove frost at your property
A freeze generally refers to air temperature at or below 32°F (0°C), while frost is ice that forms on a surface. The two are related but not identical. The National Weather Service explains that frost can form near the ground when an observed air temperature is slightly above freezing.
Official station instruments are not at your garden bed, roof valley or water line. Elevation, shelter, wind, cloud cover, soil and nearby buildings or water can make a property warmer or colder than the reporting station. A sampled station low above 32°F does not rule out frost on a colder surface; a station sample below 32°F does not prove that every nearby property froze.
What the YesterSky result can support
The result can show that a nearby station reported one or more cold samples on the selected local date. It also shows the station, distance, observation times and gaps so you can judge how complete that evidence is.
Use careful language: “the nearby station reported 30°F at 5:15 a.m.” is supported when that sample is visible. “My pipes froze at 5:15 a.m.” is a property claim the station record cannot establish. For a safety decision or active cold hazard, use current National Weather Service information rather than a past-weather lookup.
Read the sampling and local-date methodology for the full evidence contract.
Related recent-weather questions
Learn how to look up yesterday’s weather by ZIP code or city, check whether rain was reported yesterday, or review whether it was windy yesterday. The complete recent weather guide covers all three topics.