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Frankfort Square climate
Typical historical weather for Frankfort Square, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
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Annual average
11.3°C
across all months
Warmest month
28.4°C
Jul average high
Coolest month
-6.4°C
Jan average low
Annual rainfall
1117mm
total per year
Frankfort Square is typically hottest in July and coolest in January, a swing of about 34.8°C across the year. About 33% of annual rainfall falls in the three wettest months (May is typically wettest, December driest).
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
| Month | Avg high | Avg low | Rainfall | Wet days | Humidity | Wind | Cloud | Solar |
|---|---|---|---|---|---|---|---|---|
| Jan | 0.4°C · record 4.8–16.2°C | -6.4°C · record -31.7–-13°C | 68mm | 10 | 75% | 4 m/s | 72% | 1.9 kWh/m² |
| Feb | 3.7°C · record 11.5–23.3°C | -5.2°C · record -23–-10.7°C | 64mm | 9 | 70% | 4.1 m/s | 64% | 3 kWh/m² |
| Mar | 9.9°C · record 13.8–26.7°C | 0.5°C · record -18.7–-4.7°C | 107mm | 13 | 66% | 4.2 m/s | 66% | 3.9 kWh/m² |
| Apr | 15.1°C · record 25.4–29.4°C | 4.9°C · record -7.4–0.7°C | 118mm | 14 | 64% | 4.1 m/s | 65% | 5.1 kWh/m² |
| May | 21.4°C · record 27.5–34.5°C | 11.4°C · record -2.3–7.7°C | 128mm | 14 | 67% | 3.6 m/s | 63% | 6 kWh/m² |
| Jun | 27.5°C · record 31.5–36.2°C | 17.3°C · record 5.5–11.4°C | 119mm | 12 | 65% | 3.3 m/s | 54% | 6.7 kWh/m² |
| Jul | 28.4°C · record 31.3–35.1°C | 19.4°C · record 11.4–16.7°C | 109mm | 13 | 72% | 2.7 m/s | 55% | 6.4 kWh/m² |
| Aug | 27.6°C · record 31.6–35.8°C | 18.1°C · record 9.5–13.4°C | 94mm | 11 | 74% | 2.7 m/s | 51% | 5.8 kWh/m² |
| Sep | 25.1°C · record 30.1–34.1°C | 14.8°C · record 3.8–12.1°C | 75mm | 9 | 72% | 3.1 m/s | 49% | 4.7 kWh/m² |
| Oct | 18°C · record 26.6–31.4°C | 8.1°C · record -2.8–2.4°C | 112mm | 11 | 70% | 3.8 m/s | 55% | 3.1 kWh/m² |
| Nov | 9.6°C · record 11.7–25.2°C | 1.2°C · record -13.7–-4.5°C | 62mm | 8 | 70% | 4 m/s | 60% | 2.2 kWh/m² |
| Dec | 3.7°C · record 12.2–18.8°C | -3.6°C · record -25.9–-8.4°C | 61mm | 9 | 74% | 3.9 m/s | 69% | 1.7 kWh/m² |
"Avg high"/"Avg low" is the mean daily high/low for that month, averaged across every year on file. The "record" figure alongside it is a different statistic — the single hottest (or coldest) hour ever recorded during that month across all years — so it can sit above or below the average and does not describe the average's year-to-year spread. A "wet day" is any day with at least 1.0mm of rain.
Year to year
Annual average temperature, 2016–2025.
Across these 10 years, the annual average has moved by about +0.51°C per decade. That’s a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
Annual rainfall has moved by about -197.48mm per decade over the same period.
2025 (the most recent year on file) averaged 11.035928363887164°C, below the 9-year baseline of 11.35°C by 0.5 standard deviations.
Typical extremes per year
Rainy days
132.2 days
≥1.0mm rain
Heavy rain days
11 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
105.1 days
daily low ≤0°C
Averaged across 10 years on file. Thresholds match PastClimate's data pipeline definitions — see data & sources.
Records on file
Ranked across 10 years of data currently on file (2016–2025).
Hottest day
36.2°C
14 June 2022
2022 was 0.94 SD below the 9-year average that year
Coldest day
-31.7°C
31 January 2019
2019 was 2.12 SD below the 9-year average that year
Wettest day
86.8mm
25 June 2021
2021 was 0.66 SD above the 9-year average that year
Windiest day
10.2m/s
24 February 2019
2019 was 2.12 SD below the 9-year average that year
See the detail: Frankfort Square on 25 June 2021.
Nearby cities
Tinley Park
Same ERA5 grid cell
Chicago Heights
Same ERA5 grid cell
Oak Forest
Same ERA5 grid cell
Harvey
Same ERA5 grid cell
Park Forest
Same ERA5 grid cell
Homewood
Same ERA5 grid cell
Want a side-by-side view instead? Compare Frankfort Square with another city.
Frequently asked questions about Frankfort Square's climate
What is the hottest month in Frankfort Square?
July is typically the warmest month in Frankfort Square, with an average high of 28.4°C. January is typically the coolest, averaging -6.4°C overnight.
How much does it rain in Frankfort Square?
Frankfort Square gets about 1117mm of rain a year on average, with roughly 33% of it falling in the three wettest months (May is typically the wettest, December the driest).
How many extremely hot or cold days does Frankfort Square have?
On average, Frankfort Square sees about 0 day(s) a year at or above 40°C and about 105.1 day(s) at or below 0°C, based on 10 years of data.
Is Frankfort Square getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.51°C per decade. That's a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
What is the hottest day on record for Frankfort Square?
The hottest day on file is 14 June 2022 at 36.2°C, out of 10 year(s) searched.
Data & provenance
↓ Download monthly CSVData source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
- Source
- ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
- Data type
- Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
- Coverage
- 2016–2025 (10 years) for United States
- Location
- Frankfort Square — 41.500°, -87.750°, ERA5 grid cell center, 4.9 km from requested point
- Time zone
- America/Chicago
- What's shown here
- Monthly and annual averages, and dated extreme-value records, derived from an hourly base record.
- Spatial resolution
- 0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
- Version / refreshed
- Methodology v2026.07 · data last refreshed December 31, 2025
- Limitations
- A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
- Attribution
- Generated using Copernicus Climate Change Service information
Cite this data
PastClimate (2026-07-18). Historical climate data for Frankfort Square, United States (41.50°N, 87.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Frankfort Square, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Frankfort Square, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Frankfort Square, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.