Built 2026-10-16 (16 October 2026)

Rockville 5 N Weather Records (USC00357277)

Record envelope, standing records and threshold days for Rockville 5 N (USC00357277), Oregon, United States, with 50 years of record.

Key Facts for Rockville 5 N

  • Rockville 5 N (USC00357277) is a weather station in Oregon, United States at 43.36 latitude and -117.11 longitude, 1,119 m (3,670 ft) above sea level.
  • The station reports from 1963 to 2012, 50 years of record.
  • 1,464 records set at Rockville 5 N still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Rockville 5 N set a daily record snowfall of 3.8 cm (1.5 in) on 27 December 2012.

About the Station

  • Location: Oregon, United States, 43.36 latitude, -117.11 longitude.
  • Elevation: 1,119 m (3,670 ft).
  • Period of record: 1963 to 2012, 50 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Rockville 5 N, with 2026 drawn through them The band shows the record high and record low for each calendar day at Rockville 5 N. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Rockville 5 N. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Rockville 5 N, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan16.7 C (62.1 F)-31.1 C (-24.0 F)n/an/a
Feb20.6 C (69.1 F)-33.3 C (-27.9 F)n/an/a
Mar26.1 C (79.0 F)-21.7 C (-7.1 F)n/an/a
Apr31.1 C (88.0 F)-13.3 C (8.1 F)n/an/a
May35.6 C (96.1 F)-11.1 C (12.0 F)n/an/a
Jun38.9 C (102.0 F)-3.9 C (25.0 F)n/an/a
Jul42.8 C (109.0 F)-3.9 C (25.0 F)n/an/a
Aug38.9 C (102.0 F)-3.3 C (26.1 F)n/an/a
Sep36.1 C (97.0 F)-8.3 C (17.1 F)n/an/a
Oct32.2 C (90.0 F)-17.8 C (0.0 F)n/an/a
Nov26.7 C (80.1 F)-25.6 C (-14.1 F)n/an/a
Dec17.8 C (64.0 F)-36.1 C (-33.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Rockville 5 N by the year they were set 1,464 records at Rockville 5 N still stand. 1972 holds the most, with 50. 02040601963: 31964: 371965: 451966: 391967: 361968: 371969: 351970: 371971: 231972: 501973: 201974: 391975: 471976: 291977: 411978: 201979: 311980: 241981: 261982: 281983: 291984: 321985: 411986: 261987: 361988: 291989: 291990: 401991: 351992: 351993: 381994: 211995: 291996: 381997: 181998: 221999: 252000: 182001: 192002: 352003: 452004: 112005: 132006: 232007: 242008: 192009: 272010: 212011: 222012: 171963196819731978198319881993199820032008
1,464 records at Rockville 5 N still stand. 1972 holds the most, with 50.
Standing records at Rockville 5 N by the year they were set
Year setStanding records
19633
196437
196545
196639
196736
196837
196935
197037
197123
197250
197320
197439
197547
197629
197741
197820
197931
198024
198126
198228
198329
198432
198541
198626
198736
198829
198929
199040
199135
199235
199338
199421
199529
199638
199718
199822
199925
200018
200119
200235
200345
200411
200513
200623
200724
200819
200927
201021
201122
201217

All-Time Record Progression

5 new records
When Rockville 5 N set new all-time records 5 all-time records were set at Rockville 5 N between 4 August 2000 and 4 October 2009. Each dot is a new record. Record high minimum temperatureRecord high maximum temperatureRecord daily precipitation4 August 2000: Record high minimum temperature 22.2 C (72.0 F)11 July 2002: Record high maximum temperature 41.1 C (106.0 F)13 July 2002: Record high maximum temperature 42.8 C (109.0 F)22 July 2005: Record high minimum temperature 22.8 C (73.0 F)4 October 2009: Record daily precipitation 63.5 mm (2.5 in)200020052010
5 all-time records were set at Rockville 5 N between 4 August 2000 and 4 October 2009. Each dot is a new record.
When Rockville 5 N set new all-time records
DateKindDetail
2000-08-04Record high minimum temperatureRecord high minimum temperature 22.2 C (72.0 F)
2002-07-11Record high maximum temperatureRecord high maximum temperature 41.1 C (106.0 F)
2002-07-13Record high maximum temperatureRecord high maximum temperature 42.8 C (109.0 F)
2005-07-22Record high minimum temperatureRecord high minimum temperature 22.8 C (73.0 F)
2009-10-04Record daily precipitationRecord daily precipitation 63.5 mm (2.5 in)

Wettest Day of Each Month

Oct: 63.5 mm (2.5 in)
Record daily precipitation for each month at Rockville 5 N The wettest day on record for each calendar month at Rockville 5 N. The most was 63.5 mm (2.5 in) on 4 October 2009. 020406080 Jan: 25.4 mm (1.0 in), 1 January 1987 Jan Feb: 20.3 mm (0.8 in), 13 February 1983 Feb Mar: 30.7 mm (1.2 in), 17 March 1993 Mar Apr: 30.0 mm (1.2 in), 6 April 1969 Apr May: 50.8 mm (2.0 in), 26 May 1987 May Jun: 27.9 mm (1.1 in), 29 June 1991 Jun Jul: 30.0 mm (1.2 in), 30 July 1985 Jul Aug: 47.0 mm (1.9 in), 13 August 1979 Aug Sep: 36.3 mm (1.4 in), 23 September 2007 Sep Oct: 63.5 mm (2.5 in), 4 October 2009 Oct Nov: 18.3 mm (0.7 in), 22 November 1996 Nov Dec: 29.5 mm (1.2 in), 23 December 1964 Dec
The wettest day on record for each calendar month at Rockville 5 N. The most was 63.5 mm (2.5 in) on 4 October 2009.
Record daily precipitation for each month at Rockville 5 N
MonthRecord daily precipitation (mm)Date
Jan25.4 mm (1.0 in)1 January 1987
Feb20.3 mm (0.8 in)13 February 1983
Mar30.7 mm (1.2 in)17 March 1993
Apr30.0 mm (1.2 in)6 April 1969
May50.8 mm (2.0 in)26 May 1987
Jun27.9 mm (1.1 in)29 June 1991
Jul30.0 mm (1.2 in)30 July 1985
Aug47.0 mm (1.9 in)13 August 1979
Sep36.3 mm (1.4 in)23 September 2007
Oct63.5 mm (2.5 in)4 October 2009
Nov18.3 mm (0.7 in)22 November 1996
Dec29.5 mm (1.2 in)23 December 1964

Period of Record Coverage

1963 to 2012
Days with data per year at Rockville 5 N 50 years of record at Rockville 5 N, 1963 to 2012. 1 years have data for under 90 percent of days and are left out of rankings: 1963. 1963: 53 of 365 days1964: 366 of 366 days1965: 360 of 365 days1966: 358 of 365 days1967: 351 of 365 days1968: 355 of 366 days1969: 352 of 365 days1970: 351 of 365 days1971: 361 of 365 days1972: 365 of 366 days1973: 364 of 365 days1974: 363 of 365 days1975: 359 of 365 days1976: 365 of 366 days1977: 364 of 365 days1978: 360 of 365 days1979: 361 of 365 days1980: 365 of 366 days1981: 362 of 365 days1982: 362 of 365 days1983: 362 of 365 days1984: 365 of 366 days1985: 356 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 361 of 365 days1990: 361 of 365 days1991: 363 of 365 days1992: 365 of 366 days1993: 358 of 365 days1994: 365 of 365 days1995: 348 of 365 days1996: 357 of 366 days1997: 365 of 365 days1998: 358 of 365 days1999: 348 of 365 days2000: 359 of 366 days2001: 350 of 365 days2002: 344 of 365 days2003: 349 of 365 days2004: 355 of 366 days2005: 357 of 365 days2006: 361 of 365 days2007: 349 of 365 days2008: 360 of 366 days2009: 333 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 365 of 366 days19701980199020002010
50 years of record at Rockville 5 N, 1963 to 2012. 1 years have data for under 90 percent of days and are left out of rankings: 1963.
Days with data per year at Rockville 5 N
YearDays with dataShare of yearComplete
19635315%No
1964366100%Yes
196536099%Yes
196635898%Yes
196735196%Yes
196835597%Yes
196935296%Yes
197035196%Yes
197136199%Yes
1972365100%Yes
1973364100%Yes
197436399%Yes
197535998%Yes
1976365100%Yes
1977364100%Yes
197836099%Yes
197936199%Yes
1980365100%Yes
198136299%Yes
198236299%Yes
198336299%Yes
1984365100%Yes
198535698%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
198936199%Yes
199036199%Yes
199136399%Yes
1992365100%Yes
199335898%Yes
1994365100%Yes
199534895%Yes
199635798%Yes
1997365100%Yes
199835898%Yes
199934895%Yes
200035998%Yes
200135096%Yes
200234494%Yes
200334996%Yes
200435597%Yes
200535798%Yes
200636199%Yes
200734996%Yes
200836098%Yes
200933391%Yes
2010365100%Yes
2011365100%Yes
2012365100%Yes

Latest Records

20
Latest records at Rockville 5 N
DateStationRecordValueBeat old record byOld record stoodSignificance
27 December 2012Rockville 5 N, USdaily snowfall3.8 cm (1.5 in)1.3 cm (0.5 in)48 years20 of 100 (Routine)
26 December 2012Rockville 5 N, USdaily snowfall7.6 cm (3.0 in)2.5 cm (1.0 in)43 years22 of 100 (Routine)
5 December 2012Rockville 5 N, USdaily high min7.2 C (45.0 F)3.9 C (7.0 F)9 years13 of 100 (Routine)
1 December 2012Rockville 5 N, USdaily high min7.2 C (45.0 F)2.8 C (5.0 F)48 years23 of 100 (Routine)
20 November 2012Rockville 5 N, USdaily high min10.0 C (50.0 F)4.4 C (7.9 F)6 years13 of 100 (Routine)
11 November 2012Rockville 5 N, USdaily low min (Tie)-16.1 C (3.0 F)tie27 years3 of 100 (Routine)
30 October 2012Rockville 5 N, USdaily high max22.2 C (72.0 F)1.1 C (2.0 F)22 years13 of 100 (Routine)
24 October 2012Rockville 5 N, USdaily low max6.7 C (44.1 F)0.5 C (0.9 F)37 years16 of 100 (Routine)
16 October 2012Rockville 5 N, USdaily high min11.7 C (53.1 F)4.5 C (8.1 F)22 years20 of 100 (Routine)
8 October 2012Rockville 5 N, USdaily low min (Tie)-10.0 C (14.0 F)tie44 years4 of 100 (Routine)
7 October 2012Rockville 5 N, USdaily low min (Tie)-10.6 C (12.9 F)tie38 years4 of 100 (Routine)
15 September 2012Rockville 5 N, USdaily high max31.1 C (88.0 F)0.5 C (0.9 F)33 years15 of 100 (Routine)
14 September 2012Rockville 5 N, USdaily high min13.3 C (55.9 F)1.1 C (2.0 F)44 years20 of 100 (Routine)
13 September 2012Rockville 5 N, USdaily low min (Tie)-5.0 C (23.0 F)tie42 years4 of 100 (Routine)
12 September 2012Rockville 5 N, USdaily low min-4.4 C (24.1 F)1.1 C (2.0 F)24 years14 of 100 (Routine)
11 September 2012Rockville 5 N, USdaily low min (Tie)-2.2 C (28.0 F)tie33 years3 of 100 (Routine)
3 September 2012Rockville 5 N, USdaily low min (Tie)-1.1 C (30.0 F)tie37 years4 of 100 (Routine)
7 August 2012Rockville 5 N, USdaily high max (Tie)38.3 C (100.9 F)tie22 years2 of 100 (Routine)
6 August 2012Rockville 5 N, USdaily high min15.6 C (60.1 F)0.6 C (1.1 F)38 years17 of 100 (Routine)
26 July 2012Rockville 5 N, USdaily high max (Tie)37.8 C (100.0 F)tie34 years3 of 100 (Routine)

Climate Trend

43 complete years, 1964 to 2012
Annual mean temperature at Rockville 5 N as warming stripes, 1964 to 2012 One stripe for each of 43 complete years at Rockville 5 N, 1964 to 2012. Blue stripes are years cooler than the station's own mean of 8.3 C (47.0 F); red stripes are warmer. The coolest year was 1985, at 6.1 C (43.0 F), and the warmest was 2003, at 9.7 C (49.4 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1964: 7.5 C, -0.9 C from the station mean1965: 8.1 C, -0.2 C from the station mean1966: 8.8 C, +0.5 C from the station mean1968: 8.5 C, +0.1 C from the station mean1972: 8.0 C, -0.4 C from the station mean1973: 8.3 C, 0.0 C from the station mean1974: 7.9 C, -0.4 C from the station mean1975: 7.6 C, -0.7 C from the station mean1976: 7.5 C, -0.9 C from the station mean1977: 8.2 C, -0.2 C from the station mean1978: 8.1 C, -0.3 C from the station mean1979: 7.9 C, -0.4 C from the station mean1980: 8.3 C, -0.1 C from the station mean1981: 8.7 C, +0.4 C from the station mean1982: 7.4 C, -1.0 C from the station mean1983: 8.3 C, 0.0 C from the station mean1984: 7.1 C, -1.2 C from the station mean1985: 6.1 C, -2.3 C from the station mean1986: 8.6 C, +0.2 C from the station mean1987: 8.6 C, +0.3 C from the station mean1988: 8.9 C, +0.6 C from the station mean1989: 8.0 C, -0.4 C from the station mean1990: 8.9 C, +0.5 C from the station mean1991: 8.5 C, +0.1 C from the station mean1992: 9.2 C, +0.8 C from the station mean1993: 6.9 C, -1.5 C from the station mean1994: 8.8 C, +0.4 C from the station mean1996: 8.7 C, +0.3 C from the station mean1997: 8.8 C, +0.5 C from the station mean1998: 9.3 C, +0.9 C from the station mean1999: 8.5 C, +0.1 C from the station mean2000: 8.8 C, +0.5 C from the station mean2001: 8.5 C, +0.1 C from the station mean2002: 8.3 C, 0.0 C from the station mean2003: 9.7 C, +1.3 C from the station mean2004: 8.8 C, +0.4 C from the station mean2005: 8.3 C, 0.0 C from the station mean2006: 9.1 C, +0.8 C from the station mean2007: 9.1 C, +0.8 C from the station mean2008: 8.3 C, -0.1 C from the station mean2010: 8.6 C, +0.3 C from the station mean2011: 8.1 C, -0.2 C from the station mean2012: 9.3 C, +0.9 C from the station mean1964197019751980198519901995200020052010
One stripe for each of 43 complete years at Rockville 5 N, 1964 to 2012. Blue stripes are years cooler than the station's own mean of 8.3 C (47.0 F); red stripes are warmer. The coolest year was 1985, at 6.1 C (43.0 F), and the warmest was 2003, at 9.7 C (49.4 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Rockville 5 N as warming stripes, 1964 to 2012
YearAnnual mean temperatureDifference from the station mean
19647.5 C-0.85 C
19658.1 C-0.22 C
19668.8 C+0.49 C
19688.5 C+0.15 C
19728.0 C-0.37 C
19738.3 C-0.03 C
19747.9 C-0.40 C
19757.6 C-0.72 C
19767.5 C-0.85 C
19778.2 C-0.15 C
19788.1 C-0.27 C
19797.9 C-0.44 C
19808.3 C-0.07 C
19818.7 C+0.36 C
19827.4 C-0.98 C
19838.3 C-0.01 C
19847.1 C-1.22 C
19856.1 C-2.25 C
19868.6 C+0.23 C
19878.6 C+0.29 C
19888.9 C+0.60 C
19898.0 C-0.35 C
19908.9 C+0.51 C
19918.5 C+0.11 C
19929.2 C+0.84 C
19936.9 C-1.47 C
19948.8 C+0.45 C
19968.7 C+0.32 C
19978.8 C+0.49 C
19989.3 C+0.91 C
19998.5 C+0.15 C
20008.8 C+0.48 C
20018.5 C+0.15 C
20028.3 C-0.02 C
20039.7 C+1.35 C
20048.8 C+0.43 C
20058.3 C-0.04 C
20069.1 C+0.80 C
20079.1 C+0.77 C
20088.3 C-0.07 C
20108.6 C+0.29 C
20118.1 C-0.22 C
20129.3 C+0.92 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1964 to 2012. In Fahrenheit: 0.4 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rockville 5 N
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.4) per decade0.4 F (0.1 to 0.6) per decade1964 to 201243Rise
Mean daily maximum0.1 C (-0.1 to 0.3) per decade0.3 F (-0.1 to 0.6) per decade1964 to 201243Not clearly different from zero
Mean daily minimum0.3 C (0.1 to 0.4) per decade0.5 F (0.2 to 0.8) per decade1964 to 201243Rise

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

1963 to 2012
Yearly extremes at Rockville 5 N: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)200237.8 C (100.0 F)50
Coldest night (TNn)-36.1 C (-33.0 F)1990-21.7 C (-7.1 F)50
Wettest day (Rx1day)63.5 mm (2.5 in)200922.6 mm (0.9 in)50
Wettest five days (Rx5day)82.0 mm (3.2 in)196537.2 mm (1.5 in)50
Longest dry spell (CDD)90 days199452 days50

Hottest day (TXx)

Hottest day (TXx) at Rockville 5 N by year The hottest day of the year at Rockville 5 N, 1963 to 2012. The record is 42.8 C (109.0 F) in 2002, marked on the chart; the median year is 37.8 C (100.0 F). 102030405019701980199020002010Record: 42.8 C (109.0 F) in 2002
The hottest day of the year at Rockville 5 N, 1963 to 2012. The record is 42.8 C (109.0 F) in 2002, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Rockville 5 N by year
YearHottest day (TXx)
196319.4 C (66.9 F)
196435.6 C (96.1 F)
196535.6 C (96.1 F)
196637.8 C (100.0 F)
196738.3 C (100.9 F)
196838.3 C (100.9 F)
196937.8 C (100.0 F)
197036.7 C (98.1 F)
197137.2 C (99.0 F)
197237.2 C (99.0 F)
197337.8 C (100.0 F)
197436.7 C (98.1 F)
197537.8 C (100.0 F)
197636.1 C (97.0 F)
197737.8 C (100.0 F)
197837.8 C (100.0 F)
197936.7 C (98.1 F)
198038.3 C (100.9 F)
198136.7 C (98.1 F)
198237.8 C (100.0 F)
198337.2 C (99.0 F)
198436.1 C (97.0 F)
198536.7 C (98.1 F)
198636.7 C (98.1 F)
198736.7 C (98.1 F)
198839.4 C (102.9 F)
198937.8 C (100.0 F)
199038.3 C (100.9 F)
199137.2 C (99.0 F)
199238.3 C (100.9 F)
199335.0 C (95.0 F)
199437.8 C (100.0 F)
199535.0 C (95.0 F)
199637.8 C (100.0 F)
199736.7 C (98.1 F)
199838.9 C (102.0 F)
199936.7 C (98.1 F)
200038.9 C (102.0 F)
200138.3 C (100.9 F)
200242.8 C (109.0 F)
200341.1 C (106.0 F)
200437.8 C (100.0 F)
200538.9 C (102.0 F)
200638.9 C (102.0 F)
200739.4 C (102.9 F)
200837.8 C (100.0 F)
200937.8 C (100.0 F)
201037.2 C (99.0 F)
201136.1 C (97.0 F)
201238.3 C (100.9 F)

Coldest night (TNn)

Coldest night (TNn) at Rockville 5 N by year The coldest night of the year at Rockville 5 N, 1963 to 2012. The record is -36.1 C (-33.0 F) in 1990, marked on the chart; the median year is -21.7 C (-7.1 F). -40-30-20-1019701980199020002010Record: -36.1 C (-33.0 F) in 1990
The coldest night of the year at Rockville 5 N, 1963 to 2012. The record is -36.1 C (-33.0 F) in 1990, marked on the chart; the median year is -21.7 C (-7.1 F).
Coldest night (TNn) at Rockville 5 N by year
YearColdest night (TNn)
1963-10.0 C (14.0 F)
1964-26.7 C (-16.1 F)
1965-21.1 C (-6.0 F)
1966-21.7 C (-7.1 F)
1967-23.9 C (-11.0 F)
1968-18.9 C (-2.0 F)
1969-20.6 C (-5.1 F)
1970-19.4 C (-2.9 F)
1971-18.9 C (-2.0 F)
1972-33.3 C (-27.9 F)
1973-20.0 C (-4.0 F)
1974-25.6 C (-14.1 F)
1975-23.3 C (-9.9 F)
1976-24.4 C (-11.9 F)
1977-27.2 C (-17.0 F)
1978-21.1 C (-6.0 F)
1979-31.1 C (-24.0 F)
1980-30.0 C (-22.0 F)
1981-21.1 C (-6.0 F)
1982-22.2 C (-8.0 F)
1983-26.1 C (-15.0 F)
1984-30.0 C (-22.0 F)
1985-33.3 C (-27.9 F)
1986-17.2 C (1.0 F)
1987-17.2 C (1.0 F)
1988-20.6 C (-5.1 F)
1989-25.0 C (-13.0 F)
1990-36.1 C (-33.0 F)
1991-23.9 C (-11.0 F)
1992-22.2 C (-8.0 F)
1993-23.3 C (-9.9 F)
1994-19.4 C (-2.9 F)
1995-20.6 C (-5.1 F)
1996-23.3 C (-9.9 F)
1997-16.1 C (3.0 F)
1998-22.8 C (-9.0 F)
1999-13.9 C (7.0 F)
2000-12.8 C (9.0 F)
2001-20.0 C (-4.0 F)
2002-21.7 C (-7.1 F)
2003-16.1 C (3.0 F)
2004-21.7 C (-7.1 F)
2005-15.6 C (3.9 F)
2006-21.1 C (-6.0 F)
2007-21.7 C (-7.1 F)
2008-22.8 C (-9.0 F)
2009-23.3 C (-9.9 F)
2010-17.8 C (0.0 F)
2011-18.9 C (-2.0 F)
2012-21.1 C (-6.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Rockville 5 N by year The wettest day of the year at Rockville 5 N, 1963 to 2012. The record is 63.5 mm (2.5 in) in 2009, marked on the chart; the median year is 22.6 mm (0.9 in). 02040608019701980199020002010Record: 63.5 mm (2.5 in) in 2009
The wettest day of the year at Rockville 5 N, 1963 to 2012. The record is 63.5 mm (2.5 in) in 2009, marked on the chart; the median year is 22.6 mm (0.9 in).
Wettest day (Rx1day) at Rockville 5 N by year
YearWettest day (Rx1day)
19635.3 mm (0.21 in)
196429.5 mm (1.2 in)
196545.7 mm (1.8 in)
196611.4 mm (0.4 in)
196726.7 mm (1.1 in)
196828.4 mm (1.1 in)
196930.0 mm (1.2 in)
197024.4 mm (1.0 in)
197127.9 mm (1.1 in)
197220.3 mm (0.8 in)
197323.4 mm (0.9 in)
197421.1 mm (0.8 in)
197522.1 mm (0.9 in)
197622.6 mm (0.9 in)
197717.8 mm (0.7 in)
197826.7 mm (1.1 in)
197947.0 mm (1.9 in)
198025.4 mm (1.0 in)
198129.0 mm (1.1 in)
198223.4 mm (0.9 in)
198320.3 mm (0.8 in)
198421.3 mm (0.8 in)
198530.0 mm (1.2 in)
198624.1 mm (0.9 in)
198750.8 mm (2.0 in)
198813.5 mm (0.5 in)
198916.3 mm (0.6 in)
199014.7 mm (0.6 in)
199127.9 mm (1.1 in)
199216.0 mm (0.6 in)
199330.7 mm (1.2 in)
199419.1 mm (0.8 in)
199519.6 mm (0.8 in)
199622.9 mm (0.9 in)
199724.6 mm (1.0 in)
199823.9 mm (0.9 in)
199914.0 mm (0.6 in)
200027.4 mm (1.1 in)
200110.9 mm (0.4 in)
200213.5 mm (0.5 in)
200317.8 mm (0.7 in)
200421.6 mm (0.9 in)
200519.8 mm (0.8 in)
200619.6 mm (0.8 in)
200736.3 mm (1.4 in)
200812.7 mm (0.5 in)
200963.5 mm (2.5 in)
201022.6 mm (0.9 in)
201116.3 mm (0.6 in)
201211.7 mm (0.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Rockville 5 N by year The wettest five days of the year at Rockville 5 N, 1963 to 2012. The record is 82.0 mm (3.2 in) in 1965, marked on the chart; the median year is 37.2 mm (1.5 in). 02040608010019701980199020002010Record: 82.0 mm (3.2 in) in 1965
The wettest five days of the year at Rockville 5 N, 1963 to 2012. The record is 82.0 mm (3.2 in) in 1965, marked on the chart; the median year is 37.2 mm (1.5 in).
Wettest five days (Rx5day) at Rockville 5 N by year
YearWettest five days (Rx5day)
196312.1 mm (0.5 in)
196442.2 mm (1.7 in)
196582.0 mm (3.2 in)
196620.8 mm (0.8 in)
196735.8 mm (1.4 in)
196844.9 mm (1.8 in)
196954.4 mm (2.1 in)
197029.0 mm (1.1 in)
197147.3 mm (1.9 in)
197236.8 mm (1.4 in)
197328.7 mm (1.1 in)
197425.9 mm (1.0 in)
197545.7 mm (1.8 in)
197633.5 mm (1.3 in)
197726.5 mm (1.0 in)
197850.9 mm (2.0 in)
197952.3 mm (2.1 in)
198059.0 mm (2.3 in)
198148.9 mm (1.9 in)
198241.7 mm (1.6 in)
198330.7 mm (1.2 in)
198430.5 mm (1.2 in)
198548.8 mm (1.9 in)
198634.8 mm (1.4 in)
198768.6 mm (2.7 in)
198816.0 mm (0.6 in)
198928.2 mm (1.1 in)
199025.4 mm (1.0 in)
199149.2 mm (1.9 in)
199220.3 mm (0.8 in)
199348.5 mm (1.9 in)
199425.9 mm (1.0 in)
199547.9 mm (1.9 in)
199645.0 mm (1.8 in)
199744.7 mm (1.8 in)
199861.4 mm (2.4 in)
199924.2 mm (1.0 in)
200047.3 mm (1.9 in)
200114.7 mm (0.6 in)
200225.2 mm (1.0 in)
200327.2 mm (1.1 in)
200438.1 mm (1.5 in)
200537.5 mm (1.5 in)
200647.3 mm (1.9 in)
200738.8 mm (1.5 in)
200827.6 mm (1.1 in)
200973.4 mm (2.9 in)
201030.7 mm (1.2 in)
201126.1 mm (1.0 in)
201224.1 mm (0.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Rockville 5 N by year The longest dry spell of the year at Rockville 5 N, 1963 to 2012. The record is 90 days in 1994, marked on the chart; the median year is 52 days. 02040608010019701980199020002010Record: 90 days in 1994
The longest dry spell of the year at Rockville 5 N, 1963 to 2012. The record is 90 days in 1994, marked on the chart; the median year is 52 days.
Longest dry spell (CDD) at Rockville 5 N by year
YearLongest dry spell (CDD)
196314 days
196442 days
196552 days
196663 days
196776 days
196860 days
196985 days
197057 days
197143 days
197235 days
197335 days
197463 days
197534 days
197638 days
197751 days
197862 days
197953 days
198064 days
198183 days
198229 days
198325 days
198427 days
198535 days
198688 days
198777 days
198884 days
198944 days
199048 days
199147 days
199246 days
199347 days
199490 days
199528 days
199661 days
199728 days
199840 days
199967 days
200081 days
200170 days
200280 days
200372 days
200432 days
200553 days
200677 days
200780 days
200842 days
200934 days
201038 days
201145 days
201289 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.

Frost Dates and Growing Season

43 years with a frost

Across 43 years with a frost, the median last spring frost at Rockville 5 N falls on 16 June and the median first autumn frost on 4 September, which leaves a median of 82 days between them.

Fitted over all years, the growing season changes by +5.2 days per decade at this station.

Frost dates and growing season at Rockville 5 N
MeasureMedian, all yearsEarliest periodRecent period (1981 to 2012)Recent against earliestFitted trend
Last spring frost16 Junen/a14 Junen/a-1.1 days per decade
First autumn frost4 Septembern/a7 Septembern/a+4.1 days per decade
Growing days82 daysn/a82 daysn/a+5.2 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

48 years, 1964 to 2012

A day with at least 22.2 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 60.3 mm (2.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Rockville 5 N: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years22.2 mm (0.9 in)
5 years30.7 mm (1.2 in)
10 years37.0 mm (1.5 in)
25 years45.7 mm (1.8 in)
50 years52.7 mm (2.1 in)Longer than the 48 years of record
100 years60.3 mm (2.4 in)Longer than the 48 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 48 years of values from 1964 to 2012.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 63.5 mm (2.5 in) in 2009; 50.8 mm (2.0 in) in 1987; 47.0 mm (1.9 in) in 1979.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Rockville 5 N standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Rockville 5 N 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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