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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Round Mtn Weather Records (USC00417787)

Record envelope, standing records and threshold days for Round Mtn (USC00417787), Texas, United States, with 54 years of record.

Key Facts for Round Mtn

  • Round Mtn (USC00417787) is a weather station in Texas, United States at 30.42 latitude and -98.35 longitude, 393 m (1,288 ft) above sea level.
  • The station reports from 1958 to 2011, 54 years of record.
  • 0 records set at Round Mtn still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Round Mtn set a daily record precipitation of 50.8 mm (2.0 in) on 9 October 2011.

About the Station

  • Location: Texas, United States, 30.42 latitude, -98.35 longitude.
  • Elevation: 393 m (1,288 ft).
  • Period of record: 1958 to 2011, 54 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Round Mtn, with 2026 drawn through them The band shows the record high and record low for each calendar day at Round Mtn. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Round Mtn. 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 Round Mtn, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Round Mtn by the year they were set 0 records at Round Mtn still stand. 00000000000
0 records at Round Mtn still stand.
Standing records at Round Mtn by the year they were set
Year setStanding records

Wettest Day of Each Month

Sep: 228.6 mm (9.0 in)
Record daily precipitation for each month at Round Mtn The wettest day on record for each calendar month at Round Mtn. The most was 228.6 mm (9.0 in) on 22 September 1965. 0100200300 Jan: 71.1 mm (2.8 in), 8 January 1997 Jan Feb: 101.6 mm (4.0 in), 4 February 1986 Feb Mar: 82.6 mm (3.3 in), 12 March 2007 Mar Apr: 142.7 mm (5.6 in), 15 April 1977 Apr May: 211.3 mm (8.3 in), 11 May 1983 May Jun: 196.9 mm (7.8 in), 26 June 2007 Jun Jul: 180.1 mm (7.1 in), 1 July 2002 Jul Aug: 108.0 mm (4.3 in), 28 August 1974 Aug Sep: 228.6 mm (9.0 in), 22 September 1965 Sep Oct: 228.6 mm (9.0 in), 4 October 1959 Oct Nov: 110.2 mm (4.3 in), 16 November 2001 Nov Dec: 99.1 mm (3.9 in), 21 December 1991 Dec
The wettest day on record for each calendar month at Round Mtn. The most was 228.6 mm (9.0 in) on 22 September 1965.
Record daily precipitation for each month at Round Mtn
MonthRecord daily precipitation (mm)Date
Jan71.1 mm (2.8 in)8 January 1997
Feb101.6 mm (4.0 in)4 February 1986
Mar82.6 mm (3.3 in)12 March 2007
Apr142.7 mm (5.6 in)15 April 1977
May211.3 mm (8.3 in)11 May 1983
Jun196.9 mm (7.8 in)26 June 2007
Jul180.1 mm (7.1 in)1 July 2002
Aug108.0 mm (4.3 in)28 August 1974
Sep228.6 mm (9.0 in)22 September 1965
Oct228.6 mm (9.0 in)4 October 1959
Nov110.2 mm (4.3 in)16 November 2001
Dec99.1 mm (3.9 in)21 December 1991

Latest Records

20
Latest records at Round Mtn
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2011Round Mtn, USdaily rain50.8 mm (2.0 in)5.1 mm (0.20 in)28 years14 of 100 (Routine)
12 May 2011Round Mtn, USdaily rain30.0 mm (1.2 in)16.5 mm (0.6 in)42 years25 of 100 (Routine)
24 December 2010Round Mtn, USdaily rain (Tie)12.7 mm (0.5 in)tie12 years2 of 100 (Routine)
8 September 2010Round Mtn, USdaily rain93.7 mm (3.7 in)54.3 mm (2.1 in)32 years34 of 100 (Routine)
7 July 2010Round Mtn, USdaily rain50.8 mm (2.0 in)10.2 mm (0.4 in)44 years22 of 100 (Routine)
2 July 2010Round Mtn, USdaily rain69.1 mm (2.7 in)38.6 mm (1.5 in)8 years24 of 100 (Routine)
20 March 2010Round Mtn, USdaily rain23.6 mm (0.9 in)2.8 mm (0.11 in)24 years13 of 100 (Routine)
18 March 2010Round Mtn, USdaily rain24.6 mm (1.0 in)5.5 mm (0.22 in)17 years13 of 100 (Routine)
1 March 2010Round Mtn, USdaily rain26.9 mm (1.1 in)2.5 mm (0.10 in)20 years12 of 100 (Routine)
29 January 2010Round Mtn, USdaily rain36.8 mm (1.4 in)16.5 mm (0.6 in)8 years20 of 100 (Routine)
16 January 2010Round Mtn, USdaily rain27.4 mm (1.1 in)9.6 mm (0.38 in)32 years21 of 100 (Routine)
20 November 2009Round Mtn, USdaily rain50.8 mm (2.0 in)8.9 mm (0.35 in)16 years15 of 100 (Routine)
22 October 2009Round Mtn, USdaily rain89.4 mm (3.5 in)36.1 mm (1.4 in)36 years29 of 100 (Routine)
3 October 2009Round Mtn, USdaily rain7.6 mm (0.30 in)0.7 mm (0.03 in)44 years18 of 100 (Routine)
29 September 2009Round Mtn, USdaily rain10.7 mm (0.4 in)1.6 mm (0.06 in)24 years12 of 100 (Routine)
13 September 2009Round Mtn, USdaily rain47.5 mm (1.9 in)7.6 mm (0.30 in)50 years22 of 100 (Routine)
27 August 2009Round Mtn, USdaily rain (Tie)5.6 mm (0.22 in)tie43 years4 of 100 (Routine)
23 July 2009Round Mtn, USdaily rain44.5 mm (1.8 in)24.7 mm (1.0 in)2 years16 of 100 (Routine)
27 April 2009Round Mtn, USdaily rain64.0 mm (2.5 in)10.9 mm (0.4 in)36 years22 of 100 (Routine)
11 April 2009Round Mtn, USdaily rain31.0 mm (1.2 in)11.4 mm (0.4 in)40 years23 of 100 (Routine)

Extremes by Year

1958 to 2011
Yearly extremes at Round Mtn: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)228.6 mm (9.0 in)195977.5 mm (3.1 in)52
Wettest five days (Rx5day)410.8 mm (16.2 in)2002113.6 mm (4.5 in)52
Longest dry spell (CDD)94 days199940 days52

Wettest day (Rx1day)

Wettest day (Rx1day) at Round Mtn by year The wettest day of the year at Round Mtn, 1958 to 2011. The record is 228.6 mm (9.0 in) in 1959, marked on the chart; the median year is 77.5 mm (3.1 in). 0100200300196019701980199020002010Record: 228.6 mm (9.0 in) in 1959
The wettest day of the year at Round Mtn, 1958 to 2011. The record is 228.6 mm (9.0 in) in 1959, marked on the chart; the median year is 77.5 mm (3.1 in).
Wettest day (Rx1day) at Round Mtn by year
YearWettest day (Rx1day)
195811.2 mm (0.4 in)
1959228.6 mm (9.0 in)
196072.9 mm (2.9 in)
196191.4 mm (3.6 in)
196262.2 mm (2.4 in)
196348.3 mm (1.9 in)
196467.8 mm (2.7 in)
1965228.6 mm (9.0 in)
196670.6 mm (2.8 in)
1967158.8 mm (6.3 in)
196871.9 mm (2.8 in)
196958.2 mm (2.3 in)
197085.3 mm (3.4 in)
197166.8 mm (2.6 in)
197253.3 mm (2.1 in)
197381.8 mm (3.2 in)
1974142.7 mm (5.6 in)
197549.5 mm (1.9 in)
197669.9 mm (2.8 in)
1977142.7 mm (5.6 in)
197880.8 mm (3.2 in)
197957.7 mm (2.3 in)
1980124.5 mm (4.9 in)
198181.3 mm (3.2 in)
198239.1 mm (1.5 in)
1983211.3 mm (8.3 in)
198486.4 mm (3.4 in)
198561.0 mm (2.4 in)
1986101.6 mm (4.0 in)
198763.5 mm (2.5 in)
198862.7 mm (2.5 in)
1989101.6 mm (4.0 in)
199069.3 mm (2.7 in)
199199.1 mm (3.9 in)
199291.4 mm (3.6 in)
199355.9 mm (2.2 in)
199496.5 mm (3.8 in)
199584.8 mm (3.3 in)
199674.2 mm (2.9 in)
199799.1 mm (3.9 in)
199888.9 mm (3.5 in)
199941.4 mm (1.6 in)
200062.0 mm (2.4 in)
2001110.2 mm (4.3 in)
2002180.1 mm (7.1 in)
200556.9 mm (2.2 in)
200664.3 mm (2.5 in)
2007196.9 mm (7.8 in)
200851.3 mm (2.0 in)
200989.4 mm (3.5 in)
2010101.9 mm (4.0 in)
201150.8 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Round Mtn by year The wettest five days of the year at Round Mtn, 1958 to 2011. The record is 410.8 mm (16.2 in) in 2002, marked on the chart; the median year is 113.6 mm (4.5 in). 0100200300400500196019701980199020002010Record: 410.8 mm (16.2 in) in 2002
The wettest five days of the year at Round Mtn, 1958 to 2011. The record is 410.8 mm (16.2 in) in 2002, marked on the chart; the median year is 113.6 mm (4.5 in).
Wettest five days (Rx5day) at Round Mtn by year
YearWettest five days (Rx5day)
195811.2 mm (0.4 in)
1959252.2 mm (9.9 in)
196094.8 mm (3.7 in)
1961117.5 mm (4.6 in)
196278.0 mm (3.1 in)
196361.5 mm (2.4 in)
196467.8 mm (2.7 in)
1965231.4 mm (9.1 in)
196695.7 mm (3.8 in)
1967171.2 mm (6.7 in)
1968140.8 mm (5.5 in)
196981.9 mm (3.2 in)
1970121.4 mm (4.8 in)
197194.0 mm (3.7 in)
197272.1 mm (2.8 in)
197395.8 mm (3.8 in)
1974185.0 mm (7.3 in)
1975126.2 mm (5.0 in)
1976105.2 mm (4.1 in)
1977215.6 mm (8.5 in)
1978120.2 mm (4.7 in)
197973.5 mm (2.9 in)
1980265.7 mm (10.5 in)
1981139.2 mm (5.5 in)
198288.4 mm (3.5 in)
1983224.0 mm (8.8 in)
1984227.9 mm (9.0 in)
198583.8 mm (3.3 in)
1986102.9 mm (4.1 in)
1987152.6 mm (6.0 in)
1988103.3 mm (4.1 in)
1989137.1 mm (5.4 in)
199092.7 mm (3.6 in)
1991264.0 mm (10.4 in)
1992161.3 mm (6.4 in)
199367.6 mm (2.7 in)
199499.9 mm (3.9 in)
1995172.9 mm (6.8 in)
199685.7 mm (3.4 in)
1997144.8 mm (5.7 in)
1998205.9 mm (8.1 in)
199970.4 mm (2.8 in)
2000116.9 mm (4.6 in)
2001188.2 mm (7.4 in)
2002410.8 mm (16.2 in)
200562.4 mm (2.5 in)
2006103.4 mm (4.1 in)
2007277.4 mm (10.9 in)
200874.2 mm (2.9 in)
2009110.2 mm (4.3 in)
2010211.6 mm (8.3 in)
201160.7 mm (2.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Round Mtn by year The longest dry spell of the year at Round Mtn, 1958 to 2011. The record is 94 days in 1999, marked on the chart; the median year is 40 days. 20406080100196019701980199020002010Record: 94 days in 1999
The longest dry spell of the year at Round Mtn, 1958 to 2011. The record is 94 days in 1999, marked on the chart; the median year is 40 days.
Longest dry spell (CDD) at Round Mtn by year
YearLongest dry spell (CDD)
195829 days
195940 days
196035 days
196142 days
196246 days
196347 days
196431 days
196537 days
196663 days
196733 days
196828 days
196924 days
197067 days
197149 days
197236 days
197322 days
197438 days
197536 days
197636 days
197762 days
197844 days
197931 days
198042 days
198131 days
198238 days
198345 days
198436 days
198546 days
198627 days
198750 days
198848 days
198939 days
199038 days
199126 days
199250 days
199366 days
199434 days
199555 days
199661 days
199737 days
199824 days
199994 days
200064 days
200144 days
200238 days
200535 days
200660 days
200761 days
200849 days
200934 days
201050 days
201188 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.

Rainfall Return Levels

48 years, 1959 to 2010

A day with at least 78.2 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 290.6 mm (11.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Round Mtn: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years78.2 mm (3.1 in)
5 years113.2 mm (4.5 in)
10 years143.2 mm (5.6 in)
25 years191.4 mm (7.5 in)
50 years236.4 mm (9.3 in)Longer than the 48 years of record
100 years290.6 mm (11.4 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 1959 to 2010.

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: 228.6 mm (9.0 in) in 1959; 228.6 mm (9.0 in) in 1965; 211.3 mm (8.3 in) in 1983.

Download the Data

  • Data for Round Mtn standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Round Mtn 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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