The HYDRA rainfall network is operated and maintained by the City of Portland Bureau of Environmental Services. Rainfall data are provided with their permission and cooperation.
Click on the map below to open a full-screen map with links to each station.
Rainfall data for these sites are updated hourly.
[28-Mar-2022] A new rain gage was installed at OHSU Marquam Hill (#244).
[29-Mar-2022] A new rain gage was installed at OHSU South Waterfront (#245).
Disclaimer: Rainfall data on this page have not received final approval and as such are provisional and subject to final revision. The data are released on the condition that neither the USGS, the United States Government, nor the City of Portland may be held liable for any damages resulting from their use. More information about the quality of precipitation data is available.
A water year is defined as the 12-month period beginning October 1 of any year and continuing through September 30 of the following year. The water year is designated by the calendar year in which it ends and which includes 9 of the 12 months. Thus, the water year ending September 30, 2018 is called the 2018 water year.
|City of Portland Rain Gages|
|Portland Area Summary|
|Portland area -- average rainfall, 40 gages, not including the Cottrell School rain gage, which is outside of the general Portland area, and not including the Madison, Maplewood, Collins View, Metro Learning Center, Marquam Hill, or South Waterfront rain gages.||0.00||0.64||1.27||3.54||42.83|
|North region -- average rainfall, 9 gages.||0.00||0.67||1.29||3.45||41.16|
|Hayden Island Rain Gage
1740 N Jantzen Beach Ctr.
|7||16-May-2022, 18:00||0.00||0.59||1.12||2.81||38.50||data table|
|Open Meadows School Rain Gage
7602 N Emerald Ave.
|48||Station was retired on 1-Jul-2019.||data table|
|Shipyard Rain Gage
8900 N Sever Road
|82||16-May-2022, 18:00||0.00||0.64||1.20||3.08||40.97||data table|
|Columbia IPS Rain Gage
5001 N Columbia Blvd.
|107||16-May-2022, 18:00||0.00||0.69||1.30||3.32||42.76||data table|
|Albina Rain Gage
2920 N Larrabee Ave.
|117||16-May-2022, 18:00||0.00||0.64||1.30||3.76||39.00||data table|
|Swan Island Rain Gage 122
2600 N Going St.
|122||Station was retired on 27-Sep-2007.||data table|
|Marine Drive Rain Gage
7305 N Marine Dr.
|137||Station was retired on 13-Jan-2010.||data table|
|Simmons Rain Gage
16001 N Simmons Rd.
|139||16-May-2022, 18:00||0.00||0.74||1.29||3.25||40.45||data table|
|Cascade PCC Rain Gage
705 N Killingsworth St.
|153||16-May-2022, 18:00||0.00||0.61||1.27||3.82||42.14||data table|
|WPCL Rain Gage
6543 N Burlington Ave.
|160||16-May-2022, 18:00||0.01||0.74||1.44||3.80||46.04||data table|
|Terminal 4 NE Rain Gage
11040 N Lombard St.
|167||Station was retired on 25-Aug-2011.||data table|
|Astor Elementary School Rain Gage
5601 N Yale St.
|193||16-May-2022, 18:00||0.00||0.69||1.33||3.40||39.73||data table|
|Swan Island Rain Gage
||204||16-May-2022, 18:00||0.00||0.69||1.37||3.81||40.87||data table|
|North West Region|
|Northwest region -- average rainfall, 4 gages, not including the Metro Learning Center rain gage.||0.00||0.73||1.35||3.58||43.82|
|Skyline School Rain Gage
11536 NW Skyline Blvd.
|2||16-May-2022, 18:00||0.00||0.80||1.37||3.43||43.04||data table|
|Sauvie Island School Rain Gage
14445 NW Charlton Rd.
|3||16-May-2022, 18:00||0.01||0.81||1.42||3.34||43.22||data table|
|Bonny Slope School Rain Gage
10351 NW Thompson Rd.
|58||Station was retired. Data through 08-Mar-2017.||data table|
|Yeon Rain Gage
3395 NW Yeon St.
|121||16-May-2022, 18:00||0.00||0.64||1.37||4.23||47.40||data table|
|Guilds Lake Rain Gage
7110 NW Front Ave.
|125||Station was retired on 23-Mar-2005.||data table|
|Skyline Fire Station Rain Gage
8031 NW Skyline Blvd.
|147||Station was retired on 02-Nov-2003.||data table|
|Metro Learning Center Rain Gage
2033 NW Glisan St.
|173||26-May-2021, 14:00||Station down for a re-roofing project.||data table|
|Bonny Slope BSD Rain Gage
11775 NW McDaniel Rd.
|230||16-May-2022, 18:00||0.00||0.69||1.23||3.34||41.63||data table|
|North East Region|
|Northeast region -- average rainfall, 10 gages, not including the Madison rain gage.||0.00||0.62||1.24||3.43||42.60|
|PDX East Business Park Rain Gage
8599 NE Alderwood Rd.
|9||Station was retired on 21-Sep-2004.||data table|
|Fernwood School Rain Gage
3255 NE Hancock St.
|12||16-May-2022, 18:00||0.00||0.68||1.34||3.60||42.49||data table|
|Vernon School Rain Gage
2044 NE Killingsworth St.
|41||16-May-2022, 18:00||0.00||0.69||1.42||3.90||45.68||data table|
|Fremont Rain Gage
2777 NE Fremont Dr.
|72||Station was retired on 12-Aug-2010.||data table|
|Airport Way #2 Rain Gage
14614 NE Airport Way
|111||16-May-2022, 18:00||0.00||0.57||1.14||3.43||46.74||data table|
|Mallory Rain Gage
8030 NE Mallory Ave.
|115||16-May-2022, 18:00||0.00||0.62||1.21||3.14||38.60||data table|
|Beaumont School Rain Gage
4043 NE Fremont Ave.
|152||16-May-2022, 18:00||0.00||0.66||1.31||3.57||42.63||data table|
|Post Office Rain Gage
7660 NE Airport Way
|159||16-May-2022, 18:00||0.01||0.65||1.22||3.35||44.04||data table|
|Grant Park Rain Gage
1907 NE 45th Ave.
|162||Station was retired on 20-Oct-2004.||data table|
|Madison Rain Gage
2735 NE 82nd Ave.
|213||04-Jul-2019, 0:00||Station down for building reconstruction.||data table|
|Walmart Eco Roof Rain Gage
1123 N Hayden Meadows Dr.
|220||16-May-2022, 18:00||0.00||0.61||1.22||3.15||40.55||data table|
|Forty-Second Avenue Rain Gage
NE 42nd Ave and Buffalo St.
|221||16-May-2022, 18:00||0.00||0.59||1.19||3.25||40.36||data table|
|Irvington Elementary School Rain Gage
1320 NE Brazee St.
|228||16-May-2022, 18:00||0.00||0.58||1.29||3.67||42.73||data table|
|Parkrose High School Rain Gage
12003 NE Shaver St.
|235||16-May-2022, 18:00||0.01||0.57||1.09||3.22||42.19||data table|
|South West Region|
|Southwest region -- average rainfall, 7 gages, not including the Maplewood, Collins View, Marquam Hill, and South Waterfront rain gages.||0.00||0.64||1.28||3.68||43.80|
|Portland Fire Bureau Rain Gage
55 SW Ash St.
|1||16-May-2022, 18:00||0.00||0.63||1.28||3.64||44.39||data table|
|Sylvania PCC Rain Gage
SS Bldg, 12000 SW 49th Ave.
|4||16-May-2022, 18:00||0.00||0.60||1.22||4.17||42.63||data table|
|Collins View Rain Gage
(Riverdale High School)
9806 SW Boones Ferry Rd.
|10||16-May-2022, 18:00||0.00||0.53||1.17||4.04||41.73||data table|
|Vermont Hills Rain Gage
5730 SW Idaho St.
|89||Station was retired on 23-Jul-2002.||data table|
|Thomas Rain Gage
4026 SW Macadam Ave.
|120||Station was retired on 23-Jul-2009.||data table|
|Sylvan School Rain Gage
1849 SW 58th Ave.
|161||16-May-2022, 18:00||0.00||0.61||1.28||3.52||41.33||data table|
|Eco Roof Rain Gage
SW 12th and Clay
|164||16-May-2022, 18:00||0.00||0.65||1.27||3.41||44.34||data table|
|Maplewood Elementary School Rain Gage
7452 SW 52nd Ave.
|172||16-May-2022, 18:00||0.00||0.58||1.21||3.67||40.95||data table|
|Children's Museum Rain Gage
4015 SW Canyon Rd.
|192||Station was retired on 25-Aug-2021.||data table|
|OPB Rain Gage
6932 SW Macadam Ave.
|214||16-May-2022, 18:00||0.00||0.75||1.41||3.79||46.49||data table|
|Ida B. Wells-Barnett High School Rain Gage
1151 SW Vermont St.
|227||16-May-2022, 18:00||0.00||0.59||1.22||3.48||41.37||data table|
|Fire Station 18 Rain Gage
8720 SW 30th Ave.
|234||16-May-2022, 18:00||0.00||0.63||1.26||3.76||46.07||data table|
|OHSU Marquam Hill Rain Gage
3310 SW U.S. Veterans Hospital Rd.
|244||16-May-2022, 18:00||0.00||0.69||1.41||3.76||10.76||data table|
|OHSU South Waterfront Rain Gage
3930 S Macadam Ave.
|245||16-May-2022, 18:00||0.00||0.60||1.25||3.30||9.39||data table|
|South East Region|
|Southeast region -- average rainfall, 10 gages, not including the Park SE Yard rain gage.||0.00||0.61||1.23||3.62||43.47|
|Mt. Tabor Maintenance Yard Rain Gage
6437 SE Division St.
|6||16-May-2022, 18:00||0.00||0.51||1.14||3.58||44.08||data table|
|Kelly School Rain Gage
9030 SE Cooper St.
|14||16-May-2022, 18:00||0.00||0.40||1.05||3.49||44.13||data table|
|Gresham Fire Dept. Rain Gage
1333 NW Eastman Pkwy.
|20||16-May-2022, 18:00||0.01||0.66||1.40||4.09||49.37||data table|
|Holgate Rain Gage
4507 SE 136th Ave.
|21||Station was retired on 16-Feb-2012.||data table|
|Harney Rain Gage
2033 SE Harney St.
|64||16-May-2022, 18:00||0.00||0.44||1.01||3.27||42.91||data table|
|Pleasant Valley School Rain Gage
17625 SE Foster Rd.
|145||16-May-2022, 18:00||0.03||0.64||1.26||3.73||49.35||data table|
|Sunnyside School Rain Gage
3421 SE Salmon St.
|171||16-May-2022, 18:00||0.00||0.82||1.48||3.93||43.66||data table|
|Arleta School Rain Gage
5109 SE 66th Ave.
|174||16-May-2022, 18:00||0.00||0.49||1.08||3.26||39.32||data table|
|Glencoe School Rain Gage
825 SE 51st Ave.
|175||16-May-2022, 18:00||0.00||0.72||1.28||3.67||41.89||data table|
|Multnomah Rain Gage
501 SE Hawthorne Blvd.
|181||16-May-2022, 18:00||0.00||0.62||1.21||3.48||40.01||data table|
|Park SE Yard Rain Gage
5669 SE 136th Ave.
|217||16-May-2022, 18:00||0.01||0.45||1.14||3.30||42.22||data table|
|Cleveland High School Rain Gage
3400 SE 26th Ave.
|229||16-May-2022, 18:00||0.00||0.79||1.36||3.70||40.00||data table|
|Cottrell School Rain Gage
36225 SE Proctor Rd., Boring
|146||16-May-2022, 18:00||0.00||0.79||1.64||4.46||50.83||data table|