How hot is HYROX Anaheim in December, and how much sodium do you need?

By the DO IT team · NOAA normals and race dates checked November 12, 2026 · Updated 2026-11-12

Anaheim's normal December high is 66.5°F and the low is 48.3°F (NOAA 1991–2020 normals, Santa Ana John Wayne Airport), so the DO IT team's answer is that the weather won't raise your sodium needs for HYROX Anaheim on December 3–6, 2026; your own sweat rate will. The race is indoors, and a cool month outside does not mean a cool hall inside.[1–3]

DO IT sells a creatine-electrolyte powder. You don't need it to use anything on this page.

The numbers

Month	Normal high	Normal low	Source
December (race month)	66.5°F (19.2°C)	48.3°F (9.1°C)	NOAA NCEI, station USW00093184
November	71.9°F (22.2°C)	53.3°F (11.8°C)	same
August (warmest month)	80.4°F (26.9°C)	67.1°F (19.5°C)	same

December (race month)

Normal high: 66.5°F (19.2°C)
Normal low: 48.3°F (9.1°C)
Source: NOAA NCEI, station USW00093184

November

Normal high: 71.9°F (22.2°C)
Normal low: 53.3°F (11.8°C)
Source: same

August (warmest month)

Normal high: 80.4°F (26.9°C)
Normal low: 67.1°F (19.5°C)
Source: same

December has the lowest normal high and low of any month at the nearest NOAA airport station, about 14°F below the August high. These are 30-year averages, not a forecast for race weekend. Check the forecast the week of your wave.

The race itself is at the Anaheim Convention Center.[3] Indoor temperature depends on the hall, the crowd and the time of your wave, and nobody publishes it in advance. Plan for a warm room no matter what the outdoor normal says.

How much sodium, then?

Your sodium loss is sweat volume times how salty your sweat is. The ACSM puts average sweat sodium at about 35 mmol/L (roughly 800 mg per litre), with a range of about 10 to 70 mmol/L (roughly 230 to 1,600 mg per litre).[4]

Sweat lost during the race	Low-salt sweat (~230 mg/L)	Average (~800 mg/L)	Salty sweat (~1,600 mg/L)
0.5 L	~115 mg	~400 mg	~800 mg
1.0 L	~230 mg	~800 mg	~1,600 mg
1.5 L	~345 mg	~1,200 mg	~2,400 mg

0.5 L

Low-salt sweat (~230 mg/L): ~115 mg
Average (~800 mg/L): ~400 mg
Salty sweat (~1,600 mg/L): ~800 mg

1.0 L

Low-salt sweat (~230 mg/L): ~230 mg
Average (~800 mg/L): ~800 mg
Salty sweat (~1,600 mg/L): ~1,600 mg

1.5 L

Low-salt sweat (~230 mg/L): ~345 mg
Average (~800 mg/L): ~1,200 mg
Salty sweat (~1,600 mg/L): ~2,400 mg

That's what you lose, not what you have to replace during the race. Most HYROX finishes take 60 to 120 minutes, and an athlete who starts with normal sodium levels can usually finish without taking any on course.[4] Our HYROX sodium guide shows how to measure your own sweat rate with a scale.

How that compares with what's in the tub

Across the 7 creatine and electrolyte drinks we compared on November 8, 2026, sodium per serving runs from 160 mg to 1,000 mg.[5]

160 to 350 mg: a light top-up. Covers a low-salt sweater losing a litre.
500 to 550 mg: a typical sports drink. Covers about half a litre of average sweat.
1,000 mg: a heavy-sweater dose. DO IT Creatine Hydration sits here (5 g creatine monohydrate, 1,000 mg sodium per scoop).[6] It's more than a light sweater needs, and too much as a daily default for anyone told to limit salt.

Pick the product that matches your sweat, not the biggest number, and count the sodium in your breakfast too.

Race-morning plan for Anaheim

Normal salted meal 3 to 4 hours before your wave, with 400 to 600 mL of fluid.[4]
If you know you sweat heavily or salty, take your usual electrolyte drink with that meal.
Small sips in the last hour. Don't chug, and don't drink beyond your losses during the race.[1]
Keep creatine at your normal daily dose. Race week is not the time to start loading. Full timeline in our HYROX Anaheim race-morning guide.

FAQ

What's the weather in Anaheim in December?

The NOAA 1991–2020 normal at Santa Ana John Wayne Airport is a 66.5°F high and a 48.3°F low for December.[2] Pack a layer for the walk to the venue and the cool-down outside.

Is HYROX Anaheim indoors?

Yes. It runs at the Anaheim Convention Center.[3] Confirm in the organizer's final athlete information.

Do I need more sodium because it's California?

No. December in Anaheim is mild, and the race is indoors. Your sweat rate and sweat saltiness decide your sodium, not the city.

How much sodium should I take before HYROX Anaheim?

There's no single number. A salted meal and your normal fluids cover most people. If you sweat heavily or salty, use the loss table above with your own scale test, and try any pre-race dose in training before race day.

Is 1,000 mg of sodium too much before a race?

For a heavy, salty sweater losing more than a litre, it's in range. For a light sweater it's more than needed. Anyone with high blood pressure, kidney disease or a sodium-restricted diet should ask their doctor first.

How we built this

Temperatures: NOAA NCEI U.S. Climate Normals 1991–2020, monthly, station USW00093184 (Santa Ana John Wayne Airport, the nearest NOAA airport station to the Anaheim Convention Center), pulled 2026-11-10 from the NCEI data service and re-checked 2026-11-12. Race dates and venue: hyrox.com event page, read 2026-11-10 and re-checked 2026-11-12. Sodium per product: each brand's own product page, read 2026-11-08 (N = 7). Sweat sodium range: ACSM 2007 position stand. We'll refresh the product numbers quarterly.

Sources

Sawka MN et al. Exercise and fluid replacement. ACSM position stand. Med Sci Sports Exerc. 2007;39(2):377–390. https://doi.org/10.1249/mss.0b013e31802ca597
NOAA National Centers for Environmental Information. U.S. Climate Normals 1991–2020, monthly, station USW00093184. https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&stations=USW00093184&dataTypes=MLY-TMAX-NORMAL,MLY-TMIN-NORMAL&format=json
HYROX. Centr HYROX Anaheim event page (dates and venue).
DO IT. How much sodium do you need during HYROX? (ACSM and Thomas 2016 references inside).
DO IT. Creatine + electrolyte drinks compared, brand pages read 2026-11-08.
DO IT. Creatine Hydration product facts.

Unofficial; not affiliated with HYROX. General information, not medical advice.