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Forecast

Rossmoyne (32.0378°S, 115.8732°E, 5m AMSL) set as my default location ›

  1. My MLA

  2. Current condition

    TODAY
    Mostly sunny 16°
    mostly sunny
    Chance of rain: 50%
    Likely amount: < 1mm
    First
    light
    Sunrise Sunset Last light
    Sunrise Sunset
    6:50am WST 7:17am WST 5:26pm WST 5:53pm WST
    NOW
    13.6° Feels Like: 13.0°
    Relative Humidity: 92%
    Dew: 12.3°
    Wind: SSW 7km/h
    Gust: 9km/h
    Rainfall since 9am: 0.2mm
    Pressure: 1024.0hPa
  3. Today Weather

    Rossmoyne
    Now
    15.7°c
    Feels Like:
    13.8°
    Wind:
    SW 9km/h
    Gusts:
    11km/h
    Humidity:
    65%
    Mostly sunny
     
    Min
    16°
    Max
    Today in Rossmoyne
    Partly cloudy. Slight chance of a shower, most likely near the coast. Light winds.
    Tomorrow
    Mostly sunny
    Min
    16°
    Max
    Mostly sunny. Light winds.
  4. Radar

  5. Popup Radar

  6. Warnings

    There are no current warnings for Rossmoyne

  7. Next 48 Hours


    Next 48 Hours


  8. 7 day forecast

    Today: Partly cloudy. Slight chance of a shower, most likely near the coast. Light winds.

    Forecast for Rossmoyne (32.0378°S, 115.8732°E, 5m AMSL)
      Wed Thu Fri Sat Sun Mon Tue
    Summary Mostly sunny Mostly sunny Mostly sunny Sunny Late shower Showers increasing Possible thunderstorm
    Minimum 11° 11°
    Maximum 16° 16° 16° 19° 21° 20° 16°
    Chance of rain 50% 5% 5% 5% 90% 90% 90%
    Likely amount < 1mm < 1mm < 1mm < 1mm 1-5mm 20-40mm 5-10mm
    UV index Low Moderate Moderate Moderate - - -
    Frost risk Nil Nil Slight Slight Nil Nil Nil
      9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm 9am 3pm
    Wind speed 2
    (km/h)
    15
    (km/h)
    10
    (km/h)
    14
    (km/h)
    13
    (km/h)
    16
    (km/h)
    19
    (km/h)
    19
    (km/h)
    20
    (km/h)
    26
    (km/h)
    17
    (km/h)
    28
    (km/h)
    25
    (km/h)
    28
    (km/h)
    Wind direction E SSW ESE S E E ENE NE NE N N NNW NW NW
    Relative humidity 92% 73% 87% 52% 86% 52% 77% 46% 61% 46% 85% 66% 82% 70%
    Dew point 12°C 11°C 8°C 5°C 6°C 5°C 5°C 6°C 5°C 8°C 12°C 13°C 11°C 9°C
  9. 28 Day Rainfall forecast

    Rossmoyne Rain Forecast


    Rossmoyne 28-day Rainfall Forecast
    SUN
    MON
    TUE
    WED
    THU
    FRI
    SAT
    8
    LOW
    9
    10
    11
    12
    MEDIUM
    13
    HIGH
    14
    HIGH
    15
    HIGH
    16
    LOW
    17
    HIGH
    18
    LOW
    19
    MEDIUM
    20
    LOW
    21
    22
    23
    LOW
    24
    LOW
    25
    HIGH
    26
    MEDIUM
    27
    MEDIUM
    28
    MEDIUM
    29
    HIGH
    30
    HIGH
    31
    MEDIUM
    Aug 1
    HIGH
    2
    LOW
    3
    LOW
    4
    LOW
    5
    LOW
    CHANCE OF RAINFALL WITHIN DISTRICT
    NIL < 25%
    LOW 25% to 50%
    MEDIUM 50% to 75%
    HIGH ≥ 75%
    Issued Jul 8

    Issue Notes

    The hemispheric long wave pattern has remained stable in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, Western Australia, the south Pacific, the southeast Pacific, and the Atlantic Ocean.

    Summary:

    Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 20 July to 24 July, 27 July to 31 July, and 31 July to 4 August. Rain events originating in the tropics and moving south are possible about 21 July to 25 July, and 10 August to 14 August. Over Western Australia the strongest cold fronts should occur about 21 July to 25 July, 29 July to 2 August, and 2 August to 6 August.

    Forecast Explanation

    This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

    The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

    In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

  10. 12 Month Rainfall Forecast

    Rossmoyne Rain Forecast


    Rossmoyne 12-month Rainfall Forecast
    Jul
    Aug
    Sep
    Oct
    Nov
    Dec
    Jan
    Feb
    Mar
    Apr
    May
    Jun
    2020
    2021
    2
    6
    6
    5
    7
    6
    8
    7
    5
    4
    3
    1
    10
    5
    0
    1
    2 - 3
    4 - 7
    8 - 9
    10
    Well below normal
    Below normal
    Near normal
    Above normal
    Well above normal

    Issue Notes - Issued Jun 15

    ENSO status: Neutral IOD status: Neutral SAM status: Trending positive Sea surface temperatures (SSTs) across the equatorial central Pacific exhibited significant cooling over the past month, with the Nino3.4 index registering a value of -0.1in May. On the other hand, the Southern Oscillation Index (SOI) recorded a value of 2.8 during the same month. The current outlook suggests cooler than average SSTs will take hold across the equatorial Pacific Ocean during winter, potentially reaching La Nina thresholds by mid-spring. All eight international models continue to suggest a cooler side of neutral for the region throughout the remainder of the Austral winter and through spring. The current International Research Institute for Climate and Society (IRI) outlook suggests a 45:40 chance for La Nina:Neutral conditions by the end of the Austral spring. To the west of Australia, the Indian Ocean Dipole (IOD) remains neutral, normal for this time of the year. However, out of season Tropical CycloneMangga brought some significant cooling to the sea surface temperatures to the northwest of Australia late in May. This disrupted the warming trend in the region that would have led to a negative IOD by mid-winter. Nonetheless, all but one of the six main international models (BoMs outlook), continue to hint at a possible negative IOD establishing later in winter/first half of spring. In terms of precipitation across Australia, the current short-term outlook now favours below average rainfall for most of the country for the remainder of June and early July. This outlook is mainly driven by cooler SSTs across northwestern Australia, reducing the amount of available moisture in the atmosphere. As discussed earlier, tropical cyclone Mangga was a key player in the cooling of the SSTs off the northwest coast. Most models, however, are indicating a positive IOD is still on the cards later in winter and through spring, bringing a wetter outlook for most of the southern half of the country from mid-to-lateJuly. Across parts of southern Vic, NSW and Qld (east of the Great Dividing Range), southwestern WA and Tasmania, the outlook continues to favour average-to-slightly below average rainfall over the coming months as these regions transition to their ‘drier’ part of the year (eastern seaboard) or tend to be less influenced by the IOD (SW WA and Tas) but more on the phases of the Southern Annular Mode (SAM).

  11. Long range rainfall forecast

    Rossmoyne Rain Forecast


    Rossmoyne 28-day Rainfall Forecast
    SUN
    MON
    TUE
    WED
    THU
    FRI
    SAT
    8
    LOW
    9
    10
    11
    12
    MEDIUM
    13
    HIGH
    14
    HIGH
    15
    HIGH
    16
    LOW
    17
    HIGH
    18
    LOW
    19
    MEDIUM
    20
    LOW
    21
    22
    23
    LOW
    24
    LOW
    25
    HIGH
    26
    MEDIUM
    27
    MEDIUM
    28
    MEDIUM
    29
    HIGH
    30
    HIGH
    31
    MEDIUM
    Aug 1
    HIGH
    2
    LOW
    3
    LOW
    4
    LOW
    5
    LOW
    CHANCE OF RAINFALL WITHIN DISTRICT
    NIL < 25%
    LOW 25% to 50%
    MEDIUM 50% to 75%
    HIGH ≥ 75%
    Issued Jul 8

    Issue Notes

    The hemispheric long wave pattern has remained stable in recent weeks. There are five main troughs. Currently the most significant troughs are near the longitudes of South Africa, Western Australia, the south Pacific, the southeast Pacific, and the Atlantic Ocean.

    Summary:

    Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 20 July to 24 July, 27 July to 31 July, and 31 July to 4 August. Rain events originating in the tropics and moving south are possible about 21 July to 25 July, and 10 August to 14 August. Over Western Australia the strongest cold fronts should occur about 21 July to 25 July, 29 July to 2 August, and 2 August to 6 August.

    Forecast Explanation

    This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

    The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

    In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

  12. Popup - Daily historical

  13. Past 5 Days

    Rossmoyne Past 5 Days

    This Month
    Minimum Maximum Rainfall
    Saturday
    Jul 04
    11.5 °C 22.5 °C
    0.0 mm
    Sunday
    Jul 05
    11.3 °C 23.1 °C
    0.0 mm
    Monday
    Jul 06
    12.4 °C 19.7 °C
    2.4 mm
    Tuesday
    Jul 07
    12.7 °C 17.9 °C
    4.4 mm
    Wednesday
    Jul 08
    9.2 °C 16.2 °C
    3.8 mm
    Legend
  14. Almanac

    Almanac


    Rossmoyne minimum temp history (32.0378°S, 115.8732°E, 5m AMSL)
    MAXIMUM TEMPERATURE MINIMUM TEMPERATURE
    Hottest this month 23.1° 05/07/2020 Coldest this month 3.7° 02/07/2020
    Hottest on record 25.9 21/07/1994 Coldest on record -2.8 27/07/1998
    Hottest this year 41.6° 04/02/2020 Coldest this year 1.7° 19/05/2020
    Long term average 17.9° Long term average 6.7°
    Average this month 19.4° Average this month 9.9°
    Hottest July On Record Avg. max. temp. 19.0° 2007 Coldest July on record Avg. min. temp. 3.8° 2012
    Rossmoyne rainfall history (32.0378°S, 115.8732°E, 5m AMSL)
    RAINFALL
    Wettest This Month 4.4mm 07/07/2020 Total This Month 10.8mm
    3.0 days
    Long Term Average 175.0mm 17.6 days Wettest July on record 284.6mm 1974
    Driest on record 34.6mm 2012
  15. Popup - Radar

    Weather Radar for WA

  16. Year to Date

    Rossmoyne Year To Date

    Average Rainfall To Jul 533.2mm 61.7 day(s)
    Total For 2020 295.8mm 49.0 day(s)
    Total To This Day 2019 367.2mm 42.0 day(s)
    Wettest Day 26.4mm May30
    Lowest Temperature 1.7°C May19
    Highest Temperature 41.6°C Feb 4
  17. Popup - Monthly historical

  18. Climatology

    Climate History

    Rossmoyne Climatology

    Long-Term Averages
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
    Mean Max (°C) 31.4 31.6 29.6 25.8 22.0 19.0 17.9 18.7 20.0 22.9 26.3 29.0 24.5
    Mean Min (°C) 16.8 17.1 15.4 12.5 9.4 7.5 6.7 7.1 8.2 9.7 12.6 14.7 11.5
    Mean Rain (mm) 14.3 18.4 17.0 43.3 107.8 157.4 175.0 128.0 88.5 47.2 28.8 9.4 829.8
    Mean Rain Days 2.6 2.3 3.7 7.2 12.6 15.7 17.6 15.5 13.5 8.9 6.1 3.3 101.3