Weather in Neptune in May

General weather information about Neptune

Average annual temperature is 10.5 °C

Absolute maximum temperature: 37.6 °C

Absolute minimum temperature: -28.7 °C

Number of sunny days: 198 days

Number of rainy days: 138 days

Number of snow days: 29 days

Look at detailed online map of Neptune

* Weather data for Neptune United States is based on climate observations for 2026 year

Neptune air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)6.99.715.226.532.734.133.137.635.129.817.212.1
Average daytime temperature (°C)1.03.46.915.123.528.828.428.424.916.08.55.5
Average temperature (°C)-2.8-2.31.38.816.422.222.722.619.411.63.71.6
Average night temperature (°C)-5.6-7.0-2.93.710.216.017.317.615.37.80.1-0.9
Absolute minimum temperature (°C)-28.7-24.1-16.5-5.01.07.912.011.18.5-4.2-12.2-7.8

Neptune monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.410.511.913.414.715.315.013.912.511.09.79.0
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)3.96.66.98.211.312.612.711.39.36.86.84.1
Precipitation (mm)50608610124185856131701433
Sunny days161512152318131913142515
Rainy days710101481218121715411
Snow days839100000215

Neptune - weather forecast by months

Neptune weather in januaryNeptune weather in februaryNeptune weather in marchNeptune weather in aprilNeptune weather in mayNeptune weather in juneNeptune weather in julyNeptune weather in augustNeptune weather in septemberNeptune weather in octoberNeptune weather in novemberNeptune weather in december

Best time to visit Neptune:

The best time to visit Neptune during the most sunny months:

  • May — 11.3(h)
  • June — 12.6(h)
  • July — 12.7(h)
  • August — 11.3(h)

Months with the longest average daylight duration in Neptune:

  • June — 15.3(h)

The largest precipitation sum in Neptune is at

  • March — 86(mm)
  • April — 101(mm)
  • September — 131(mm)

    • Weather forecast in the closest to Neptune admin centers

    Weather forecast in the closest towns to Neptune

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    Frequently asked questions

    When is the best time to visit Neptune?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Neptune.
    What is the weather like in Neptune?
    See average temperature, rainfall and daylight hours for Neptune by month in the table above.
    How many sunny days does Neptune have?
    The monthly weather statistics above show sunshine and rainfall patterns for Neptune throughout the year.