I'm building a boat to explore the Bahamas and plan on using rainwater collection as my primary water source, with a solar still as a backup. I am having trouble finding rainfall data that doesn't conflict between various sources. I need reliable information to size my collector properly. Any leads on websites with actual, or otherwise ironclad rainfall data would be much appreciated.

@Timmy Supercell's idea to make this thread, a list of longest stretches of consecutive 90 degree days in OR and WA locations:

Washington:

Bellingham: 3 days from June 26th to June 28th, 2021

Everett: 4 days from both June 26th to June 29th, 2021 and July 17th to July 20th, 1998

Seattle: 5 days from both July 1st to July 5th, 2015 and August 7th to August 11th, 1981

Olympia: 8 days from both July 26th to August 2nd, 2009 and August 12th to August 19th, 1967

Centralia: 9 days from July 26th to August 3rd, 2009

Aberdeen: 4 days from August 8th to August 11th, 1981

Hoquiam: 3 days from August 8th to August 10th, 1981

Cedar Lake: 5 days from August 8th to August 12th, 1981

Yakima: 32 days from July 13th to August 13th, 1971

Kennewick: 37 days from both July 7th to August 12th, 1910 and July 19th to August 24th, 1942

Walla Walla: 31 days from July 14th to August 13th, 1971

Ellensburg: 15 days from August 6th to August 20th, 1981 and August 7th to August 21st, 1977 and July 19th to August 12th, 2017

Wenatchee: 31 days from July 14th to August 13th, 1971

Chelan: 19 days from July 17th to August 4th, 1971

Ice Harbor Dam: 31 days from July 15th to August 14th, 1971

Spokane: 15 days from July 28th to August 11th, 2017

Mazama: 19 days from both July 17th to August 4th, 1971 and July 26th to August 13th, 2017

Pullman: 14 days from June 26th to July 9th, 2015

Oregon:

Portland: 10 days from July 25th to August 3rd, 2009

Salem: 13 days from July 29th to August 10th, 2017

Eugene: 12 days from both July 12th to July 23rd, 1938 and July 24th to August 4th, 2021

Medford: 34 days from both June 17th to July 20th, 2021 and July 8th to August 10th, 1961

Klamath Falls: 34 days from June 28th to July 31st, 1906

The Dalles: 26 days from August 7th to September 1st, 1923

Bend: 19 days from July 20th to August 7th, 1927

Pendleton: 31 days from both June 30th to July 30th, 1906 and July 14th to August 13th, 1971.

Redmond: 28 days from June 18th to July 15th, 2021

Baker City: 21 days from July 22nd to August 11th, 1978

La Grande: 32 days from July 15th to August 15th, 1971

Ontario: 74 days from June 28th to September 9th, 1967

Pelton Dam: 40 days from both June 18th to July 17th, 2021 and July 13th to August 21st, 1971

Tillamook 1 W: 6 days from August 11th to August 16th, 2021

Brookings: 3 days from October 7h to October 9th, 2002

Hood River: 13 days from August 6th to August 18th, 1977

Burns: 22 days from June 24th to July 15th, 2021

Looking at the data, in a lot of East side locations, 1971 was the main one that showed up. 2021 was second a lot of the time as well. 2009 and 1981 show up a lot West of the Cascades.

I got all of the data from this site: https://mesonet.agron.iastate.edu/plotting/auto/?_wait=no&q=216&network=ORCLIMATE&station=OR1175&var=high&dir=above&threshold=90&_r=t&dpi=100&_fmt=png