May
May · September · August
United States · 1991–2020
May leads for comfortable weather in Inca: typically 25.8°C by day, 5.4°C at night, with 18 mm of rain. Based on measured 1991–2020 NOAA station history.
May · September · August
August · July · September
April · October · May
The weakest month is January, scoring 5 against May’s 77 — days reach only 7°C, 17° below the 24°C the score treats as ideal, and nights drop to -7.9°C.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 7°C | -7.9°C | 26 mm | 4.6 | 9 h 53 | 5 | Strong coverage |
| February | 10.6°C | -5.3°C | 19 mm | 3.8 | 10 h 46 | 19 | Strong coverage |
| March | 16.3°C | -2.4°C | 20 mm | 3.3 | 11 h 51 | 43 | Strong coverage |
| April | 20.6°C | 0.7°C | 17 mm | 2.8 | 13 h 05 | 63 | Strong coverage |
| May | 25.8°C | 5.4°C | 18 mm | 2.7 | 14 h 07 | 77 | Strong coverage |
| June | 31.6°C | 10.1°C | 7 mm | 1.5 | 14 h 40 | 66 | Strong coverage |
| July | 33.7°C | 15°C | 23 mm | 3.9 | 14 h 27 | 67 | Strong coverage |
| August | 32°C | 14.2°C | 35 mm | 5.3 | 13 h 34 | 70 | Strong coverage |
| September | 28.2°C | 9.5°C | 29 mm | 4.6 | 12 h 22 | 75 | Strong coverage |
| October | 21.3°C | 2.5°C | 24 mm | 4.1 | 11 h 11 | 68 | Strong coverage |
| November | 13.4°C | -3.3°C | 19 mm | 3.4 | 10 h 09 | 32 | Strong coverage |
| December | 7.1°C | -7.3°C | 19 mm | 4.2 | 9 h 39 | 5 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C1 Jan 1981 | -32.2°C22 Jan 1930 | 27 mm17 Jan 2020 | 78 mm1993 · driest 0 mm in 1934 | 113 |
| February | 25.6°C21 Feb 1958 | -32.8°C8 Feb 1933 | 23 mm26 Feb 1987 | 74 mm1987 · driest 0 mm in 1954 | 111 |
| March | 31.7°C27 Mar 2026 | -19.4°C3 Mar 2002 | 31 mm10 Mar 2022 | 74 mm1938 · driest 0 mm in 1997 | 112 |
| April | 31.7°C30 Apr 1943 | -16.7°C7 Apr 2012 | 34 mm28 Apr 1952 | 118 mm1926 · driest 0 mm in 2021 | 109 |
| May | 36.7°C31 May 2002 | -11.1°C7 May 1975 | 27 mm27 May 2009 | 97 mm1941 · driest 0 mm in 2002 | 113 |
| June | 40.6°C19 Jun 2021 | -4.4°C9 Jun 1974 | 31 mm19 Jun 2022 | 74 mm1927 · driest 0 mm in 1939 | 115 |
| July | 41.1°C18 Jul 2023 | 3.9°C19 Jul 1897 | 38 mm24 Jul 2013 | 77 mm1986 · driest 0 mm in 2023 | 112 |
| August | 40.6°C4 Aug 1960 | 2.2°C27 Aug 1978 | 68 mm27 Aug 2015 | 143 mm1929 · driest 0 mm in 1962 | 112 |
| September | 38.3°C7 Sep 2022 | -5.6°C20 Sep 1978 | 41 mm11 Sep 2002 | 107 mm1941 · driest 0 mm in 1898 | 111 |
| October | 33.3°C5 Oct 1999 | -14.4°C31 Oct 2019 | 35 mm20 Oct 1953 | 132 mm1972 · driest 0 mm in 1975 | 112 |
| November | 25.0°C5 Nov 1931 | -21.7°C24 Nov 1931 | 30 mm1 Nov 1986 | 86 mm1986 · driest 0 mm in 1977 | 112 |
| December | 20.6°C11 Dec 1939 | -31.1°C25 Dec 1924 | 28 mm31 Dec 2016 | 79 mm1940 · driest 0 mm in 1895 | 112 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 2 |
| February | 0 | 0 | 25 | <1 | 2 |
| March | <1 | 0 | 23 | <1 | <1 |
| April | 5 | <1 | 14 | <1 | <1 |
| May | 19 | 5 | 3 | <1 | 0 |
| June | 28 | 22 | 0 | <1 | 0 |
| July | 30 | 28 | 0 | <1 | 0 |
| August | 30 | 25 | 0 | 1 | 0 |
| September | 24 | 10 | <1 | <1 | 0 |
| October | 8 | <1 | 8 | <1 | <1 |
| November | 0 | 0 | 23 | <1 | <1 |
| December | 0 | 0 | 28 | <1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | 1% | 11% | 2.6–9.1°C |
| February | 1% | 13% | 1% | 12% | 7.0–13.0°C |
| March | 16% | 13% | 1% | 11% | 11.9–17.7°C |
| April | 57% | 11% | 1% | 8% | 17.5–22.5°C |
| May | 83% | 9% | 1% | 6% | 23.1–27.7°C |
| June | 94% | 6% | 1% | 4% | 28.4–33.4°C |
| July | 86% | 14% | 2% | 12% | 31.1–35.1°C |
| August | 83% | 16% | 3% | 13% | 29.8–33.6°C |
| September | 85% | 14% | 3% | 11% | 25.5–30.1°C |
| October | 62% | 13% | 3% | 10% | 18.7–23.8°C |
| November | 9% | 10% | 2% | 6% | 10.3–15.7°C |
| December | 0% | 13% | 1% | 9% | 3.6–9.3°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page