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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Peru Grissom AFB Weather Records (USW00094833)

Record envelope, standing records and threshold days for Peru Grissom AFB (USW00094833), Indiana, United States, with 72 years of record.

Key Facts for Peru Grissom AFB

  • Peru Grissom AFB (USW00094833) is a weather station in Indiana, United States at 40.65 latitude and -86.15 longitude, 251 m (823 ft) above sea level.
  • The station reports from 1955 to 2026, 72 years of record.
  • 1,464 records set at Peru Grissom AFB still stand.
  • Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

  • Location: Indiana, United States, 40.65 latitude, -86.15 longitude.
  • Elevation: 251 m (823 ft).
  • Period of record: 1955 to 2026, 72 years.
  • Eligible elements: none yet.

Daily Record Envelope and 2026

53 days at or beyond a record
Daily record high and record low at Peru Grissom AFB, with 2026 drawn through them The band shows the record high and record low for each calendar day at Peru Grissom AFB. The lines show the 2026 daily maximum and minimum. 53 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Peru Grissom AFB. The lines show the 2026 daily maximum and minimum. 53 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Peru Grissom AFB, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.3 C (64.9 F)-28.3 C (-18.9 F)9.0 C (48.2 F)-20.1 C (-4.2 F)
Feb19.4 C (66.9 F)-23.9 C (-11.0 F)16.5 C (61.7 F)-16.8 C (1.8 F)
Mar26.6 C (79.9 F)-20.0 C (-4.0 F)26.6 C (79.9 F)-10.1 C (13.8 F)
Apr30.0 C (86.0 F)-7.2 C (19.0 F)28.5 C (83.3 F)-3.7 C (25.3 F)
May32.2 C (90.0 F)-1.7 C (28.9 F)30.3 C (86.5 F)4.1 C (39.4 F)
Jun36.7 C (98.1 F)4.4 C (39.9 F)33.7 C (92.7 F)5.0 C (41.0 F)
Jul37.2 C (99.0 F)6.7 C (44.1 F)34.8 C (94.6 F)15.2 C (59.4 F)
Aug35.6 C (96.1 F)2.8 C (37.0 F)33.6 C (92.5 F)9.1 C (48.4 F)
Sep33.9 C (93.0 F)0.6 C (33.1 F)32.0 C (89.6 F)7.1 C (44.8 F)
Oct32.1 C (89.8 F)-6.7 C (19.9 F)32.1 C (89.8 F)-0.2 C (31.6 F)
Nov24.4 C (75.9 F)-18.3 C (-0.9 F)20.2 C (68.4 F)-6.3 C (20.7 F)
Dec20.0 C (68.0 F)-26.7 C (-16.1 F)18.2 C (64.8 F)-19.5 C (-3.1 F)

Which Years Hold Standing Records

1,464 standing records
Standing records at Peru Grissom AFB by the year they were set 1,464 records at Peru Grissom AFB still stand. 1966 holds the most, with 115. 0501001501956: 871957: 981958: 881959: 1061960: 851961: 991962: 791963: 1101964: 901965: 1011966: 1151967: 1041968: 721969: 591970: 662025: 10519561958196019621964196619681970
1,464 records at Peru Grissom AFB still stand. 1966 holds the most, with 115.
Standing records at Peru Grissom AFB by the year they were set
Year setStanding records
195687
195798
195888
1959106
196085
196199
196279
1963110
196490
1965101
1966115
1967104
196872
196959
197066
2025105

Wettest Day of Each Month

Jun: 113.0 mm (4.4 in)
Record daily precipitation for each month at Peru Grissom AFB The wettest day on record for each calendar month at Peru Grissom AFB. The most was 113.0 mm (4.4 in) on 8 June 1958. 050100150 Jan: 46.2 mm (1.8 in), 28 January 1969 Jan Feb: 91.7 mm (3.6 in), 24 February 1956 Feb Mar: 38.4 mm (1.5 in), 4 March 1963 Mar Apr: 53.3 mm (2.1 in), 19 April 1970 Apr May: 64.3 mm (2.5 in), 15 May 1968 May Jun: 113.0 mm (4.4 in), 8 June 1958 Jun Jul: 79.5 mm (3.1 in), 19 July 1963 Jul Aug: 65.3 mm (2.6 in), 15 August 1958 Aug Sep: 61.7 mm (2.4 in), 2 September 1969 Sep Oct: 53.6 mm (2.1 in), 12 October 1969 Oct Nov: 48.8 mm (1.9 in), 25 November 1958 Nov Dec: 80.0 mm (3.1 in), 21 December 1967 Dec
The wettest day on record for each calendar month at Peru Grissom AFB. The most was 113.0 mm (4.4 in) on 8 June 1958.
Record daily precipitation for each month at Peru Grissom AFB
MonthRecord daily precipitation (mm)Date
Jan46.2 mm (1.8 in)28 January 1969
Feb91.7 mm (3.6 in)24 February 1956
Mar38.4 mm (1.5 in)4 March 1963
Apr53.3 mm (2.1 in)19 April 1970
May64.3 mm (2.5 in)15 May 1968
Jun113.0 mm (4.4 in)8 June 1958
Jul79.5 mm (3.1 in)19 July 1963
Aug65.3 mm (2.6 in)15 August 1958
Sep61.7 mm (2.4 in)2 September 1969
Oct53.6 mm (2.1 in)12 October 1969
Nov48.8 mm (1.9 in)25 November 1958
Dec80.0 mm (3.1 in)21 December 1967

Period of Record Coverage

1956 to 2025
Days with data per year at Peru Grissom AFB 16 years of record at Peru Grissom AFB, 1956 to 2025. Every year has data for at least 90 percent of its days. 1956: 354 of 366 days1957: 361 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 363 of 366 days1965: 361 of 365 days1966: 362 of 365 days1967: 362 of 365 days1968: 363 of 366 days1969: 362 of 365 days1970: 363 of 365 days2025: 358 of 365 days1960196519702025
16 years of record at Peru Grissom AFB, 1956 to 2025. Every year has data for at least 90 percent of its days.
Days with data per year at Peru Grissom AFB
YearDays with dataShare of yearComplete
195635497%Yes
195736199%Yes
1958365100%Yes
1959364100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
196436399%Yes
196536199%Yes
196636299%Yes
196736299%Yes
196836399%Yes
196936299%Yes
197036399%Yes
202535898%Yes

Latest Records

0

No records were set at this station in the latest data.

Climate Trend

16 complete years, 1956 to 2025
Annual mean temperature at Peru Grissom AFB as warming stripes, 1956 to 2025 One stripe for each of 16 complete years at Peru Grissom AFB, 1956 to 2025. Blue stripes are years cooler than the station's own mean of 10.0 C (50.0 F); red stripes are warmer. The coolest year was 1963, at 8.7 C (47.7 F), and the warmest was 2025, at 11.9 C (53.4 F). The strongest colour marks a difference of 2.0 C (3.6 F). 1956: 11.1 C, +1.1 C from the station mean1957: 11.0 C, +1.0 C from the station mean1958: 9.7 C, -0.3 C from the station mean1959: 10.9 C, +0.9 C from the station mean1960: 9.9 C, -0.1 C from the station mean1961: 9.5 C, -0.5 C from the station mean1962: 9.4 C, -0.6 C from the station mean1963: 8.7 C, -1.3 C from the station mean1964: 10.1 C, +0.1 C from the station mean1965: 9.8 C, -0.2 C from the station mean1966: 9.5 C, -0.5 C from the station mean1967: 8.9 C, -1.1 C from the station mean1968: 9.7 C, -0.3 C from the station mean1969: 9.7 C, -0.3 C from the station mean1970: 10.2 C, +0.2 C from the station mean2025: 11.9 C, +1.9 C from the station mean19561960197019801990200020102020
One stripe for each of 16 complete years at Peru Grissom AFB, 1956 to 2025. Blue stripes are years cooler than the station's own mean of 10.0 C (50.0 F); red stripes are warmer. The coolest year was 1963, at 8.7 C (47.7 F), and the warmest was 2025, at 11.9 C (53.4 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Peru Grissom AFB as warming stripes, 1956 to 2025
YearAnnual mean temperatureDifference from the station mean
195611.1 C+1.06 C
195711.0 C+0.97 C
19589.7 C-0.33 C
195910.9 C+0.92 C
19609.9 C-0.11 C
19619.5 C-0.49 C
19629.4 C-0.61 C
19638.7 C-1.27 C
196410.1 C+0.11 C
19659.8 C-0.18 C
19669.5 C-0.54 C
19678.9 C-1.11 C
19689.7 C-0.30 C
19699.7 C-0.27 C
197010.2 C+0.24 C
202511.9 C+1.91 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1955 to 2026
Yearly extremes at Peru Grissom AFB: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.2 C (99.0 F)196634.5 C (94.1 F)17
Coldest night (TNn)-28.3 C (-18.9 F)1963-24.4 C (-11.9 F)17
Wettest day (Rx1day)113.0 mm (4.4 in)195862.4 mm (2.5 in)16
Wettest five days (Rx5day)226.0 mm (8.9 in)1958100.5 mm (4.0 in)16
Longest dry spell (CDD)33 days196918 days16

Hottest day (TXx)

Hottest day (TXx) at Peru Grissom AFB by year The hottest day of the year at Peru Grissom AFB, 1955 to 2026. The record is 37.2 C (99.0 F) in 1966, marked on the chart; the median year is 34.5 C (94.1 F). 323436381960198020002020Record: 37.2 C (99.0 F) in 1966
The hottest day of the year at Peru Grissom AFB, 1955 to 2026. The record is 37.2 C (99.0 F) in 1966, marked on the chart; the median year is 34.5 C (94.1 F).
Hottest day (TXx) at Peru Grissom AFB by year
YearHottest day (TXx)
1955n/a
195636.1 C (97.0 F)
195736.7 C (98.1 F)
195833.9 C (93.0 F)
195935.0 C (95.0 F)
196033.9 C (93.0 F)
196133.3 C (91.9 F)
196235.6 C (96.1 F)
196333.3 C (91.9 F)
196434.4 C (93.9 F)
196532.2 C (90.0 F)
196637.2 C (99.0 F)
196733.9 C (93.0 F)
196835.6 C (96.1 F)
196933.9 C (93.0 F)
197037.2 C (99.0 F)
202534.8 C (94.6 F)
202634.5 C (94.1 F)

Coldest night (TNn)

Coldest night (TNn) at Peru Grissom AFB by year The coldest night of the year at Peru Grissom AFB, 1955 to 2026. The record is -28.3 C (-18.9 F) in 1963, marked on the chart; the median year is -24.4 C (-11.9 F). -30-25-20-151960198020002020Record: -28.3 C (-18.9 F) in 1963
The coldest night of the year at Peru Grissom AFB, 1955 to 2026. The record is -28.3 C (-18.9 F) in 1963, marked on the chart; the median year is -24.4 C (-11.9 F).
Coldest night (TNn) at Peru Grissom AFB by year
YearColdest night (TNn)
1955n/a
1956-17.8 C (0.0 F)
1957-22.8 C (-9.0 F)
1958-25.6 C (-14.1 F)
1959-23.9 C (-11.0 F)
1960-25.0 C (-13.0 F)
1961-21.7 C (-7.1 F)
1962-24.4 C (-11.9 F)
1963-28.3 C (-18.9 F)
1964-19.4 C (-2.9 F)
1965-24.4 C (-11.9 F)
1966-25.0 C (-13.0 F)
1967-26.7 C (-16.1 F)
1968-27.8 C (-18.0 F)
1969-20.6 C (-5.1 F)
1970-27.2 C (-17.0 F)
2025-20.1 C (-4.2 F)
2026-21.8 C (-7.2 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Peru Grissom AFB by year The wettest day of the year at Peru Grissom AFB, 1955 to 2026. The record is 113.0 mm (4.4 in) in 1958, marked on the chart; the median year is 62.4 mm (2.5 in). 4060801001201960198020002020Record: 113.0 mm (4.4 in) in 1958
The wettest day of the year at Peru Grissom AFB, 1955 to 2026. The record is 113.0 mm (4.4 in) in 1958, marked on the chart; the median year is 62.4 mm (2.5 in).
Wettest day (Rx1day) at Peru Grissom AFB by year
YearWettest day (Rx1day)
1955n/a
195691.7 mm (3.6 in)
195762.7 mm (2.5 in)
1958113.0 mm (4.4 in)
195957.9 mm (2.3 in)
196050.3 mm (2.0 in)
196149.0 mm (1.9 in)
196243.4 mm (1.7 in)
196379.5 mm (3.1 in)
196462.0 mm (2.4 in)
196564.0 mm (2.5 in)
196655.6 mm (2.2 in)
196780.0 mm (3.1 in)
196864.3 mm (2.5 in)
196961.7 mm (2.4 in)
197053.3 mm (2.1 in)
2025n/a
202683.4 mm (3.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Peru Grissom AFB by year The wettest five days of the year at Peru Grissom AFB, 1955 to 2026. The record is 226.0 mm (8.9 in) in 1958, marked on the chart; the median year is 100.5 mm (4.0 in). 501001502002501960198020002020Record: 226.0 mm (8.9 in) in 1958
The wettest five days of the year at Peru Grissom AFB, 1955 to 2026. The record is 226.0 mm (8.9 in) in 1958, marked on the chart; the median year is 100.5 mm (4.0 in).
Wettest five days (Rx5day) at Peru Grissom AFB by year
YearWettest five days (Rx5day)
1955n/a
1956116.6 mm (4.6 in)
195781.8 mm (3.2 in)
1958226.0 mm (8.9 in)
195995.1 mm (3.7 in)
196059.7 mm (2.4 in)
196189.9 mm (3.5 in)
196262.0 mm (2.4 in)
196397.0 mm (3.8 in)
1964120.9 mm (4.8 in)
1965103.9 mm (4.1 in)
1966117.3 mm (4.6 in)
1967106.4 mm (4.2 in)
1968108.7 mm (4.3 in)
196986.4 mm (3.4 in)
197077.7 mm (3.1 in)
2025n/a
2026209.5 mm (8.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Peru Grissom AFB by year The longest dry spell of the year at Peru Grissom AFB, 1955 to 2026. The record is 33 days in 1969, marked on the chart; the median year is 18 days. 0102030401960198020002020Record: 33 days in 1969
The longest dry spell of the year at Peru Grissom AFB, 1955 to 2026. The record is 33 days in 1969, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Peru Grissom AFB by year
YearLongest dry spell (CDD)
1955n/a
195627 days
195716 days
195822 days
195915 days
196021 days
196115 days
196218 days
196318 days
196427 days
196513 days
196619 days
196715 days
196817 days
196933 days
197020 days
2025n/a
20263 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

  • Data for Peru Grissom AFB standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Peru Grissom AFB threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).