California, United States of America · population 56,058 · 262 weather stations within 200 km · records 1837 to 2025
Porterville has an average annual daytime high of 25.3°C, based on the 1951 to 1980 baseline. Its warmest month is July, when highs typically reach 37.4°C, and its coldest is December, with overnight lows near 2.0°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Porterville's average temperature has risen by +1.7°C. Compared to the earliest station records that begin in 1837, warming totals +2.0°C.
20-year smoothed annual temperature reconstructed from station anomalies. Dashed line: 1951–1980 baseline.
Daytime highs sit within a comfortable 15°C to 26°C range.
Porterville's average annual daytime high is 25.3°C, based on the 1951 to 1980 baseline period. The warmest month is July, with highs averaging 37.4°C, and the coldest is December, with lows averaging 2.0°C.
July is the warmest month in Porterville, with typical daytime highs of 37.4°C.
2014 is the hottest year on record for Porterville, running +2.5°C above the 1951 to 1980 baseline.
Yes. Since 1900, Porterville has warmed by roughly +1.7°C.
February to November typically offers the most comfortable daytime highs, in the 15°C to 26°C range.
Baseline period 1951 to 1980. Monthly averages are the mean of station observations weighted by proximity. Warming trend is the 20-year smoothed anomaly against that baseline.